diff --git a/docs/nav/reference/storage-gcs.md b/docs/nav/reference/storage-gcs.md
new file mode 100644
index 00000000..6ee437f7
--- /dev/null
+++ b/docs/nav/reference/storage-gcs.md
@@ -0,0 +1,3 @@
+# StorageGCS
+
+::: dotflow.providers.storage_gcs.StorageGCS
diff --git a/docs/nav/tutorial/storage-gcs.md b/docs/nav/tutorial/storage-gcs.md
new file mode 100644
index 00000000..e4db8bb4
--- /dev/null
+++ b/docs/nav/tutorial/storage-gcs.md
@@ -0,0 +1,25 @@
+# Storage GCS
+
+Persists task output to Google Cloud Storage. Good for serverless and cloud-native workflows on GCP.
+
+/// note
+Requires `pip install dotflow[gcp]`
+///
+
+## Example
+
+{* ./docs_src/storage/storage_gcs.py ln[1:34] hl[2,16:22] *}
+
+## Authentication
+
+`StorageGCS` uses Application Default Credentials (ADC):
+
+1. Environment variable: `GOOGLE_APPLICATION_CREDENTIALS` pointing to a service account JSON
+2. `gcloud auth application-default login` for local development
+3. Service account: automatic on Cloud Run, Cloud Functions, GKE
+
+No credentials are needed in code — the GCP client handles it transparently.
+
+## References
+
+- [StorageGCS](https://dotflow-io.github.io/dotflow/nav/reference/storage-gcs/)
diff --git a/docs_src/storage/storage_gcs.py b/docs_src/storage/storage_gcs.py
new file mode 100644
index 00000000..3a91b1b7
--- /dev/null
+++ b/docs_src/storage/storage_gcs.py
@@ -0,0 +1,36 @@
+from dotflow import Config, DotFlow, action
+from dotflow.providers import StorageGCS
+
+
+@action
+def step_one():
+    return {"message": "hello from GCS"}
+
+
+@action
+def step_two(previous_context):
+    print(previous_context.storage)
+    return "ok"
+
+
+config = Config(
+    storage=StorageGCS(
+        bucket="dotflow-io-bucket",
+        prefix="workflows/",
+        project="etl-test",
+    )
+)
+
+
+def main():
+    workflow = DotFlow(config=config)
+
+    workflow.task.add(step=step_one)
+    workflow.task.add(step=step_two)
+    workflow.start()
+
+    return workflow
+
+
+if __name__ == "__main__":
+    main()
diff --git a/dotflow/providers/__init__.py b/dotflow/providers/__init__.py
index 9dee74d4..d46a2584 100644
--- a/dotflow/providers/__init__.py
+++ b/dotflow/providers/__init__.py
@@ -13,6 +13,7 @@
     "StorageDefault",
     "StorageFile",
     "StorageS3",
+    "StorageGCS",
 ]
 
 
@@ -21,4 +22,10 @@ def __getattr__(name):
         from dotflow.providers.storage_s3 import StorageS3
 
         return StorageS3
+
+    if name == "StorageGCS":
+        from dotflow.providers.storage_gcs import StorageGCS
+
+        return StorageGCS
+
     raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
diff --git a/dotflow/providers/storage_gcs.py b/dotflow/providers/storage_gcs.py
new file mode 100644
index 00000000..e39b1bf6
--- /dev/null
+++ b/dotflow/providers/storage_gcs.py
@@ -0,0 +1,119 @@
+"""Storage GCS"""
+
+from collections.abc import Callable
+from json import dumps, loads
+from typing import Any
+
+from dotflow.abc.storage import Storage
+from dotflow.core.context import Context
+from dotflow.core.exception import ModuleNotFound
+
+
+class StorageGCS(Storage):
+    """
+    Import:
+        You can import the **StorageGCS** class directly from dotflow providers:
+
+            from dotflow.providers import StorageGCS
+
+    Example:
+        `class` dotflow.providers.storage_gcs.StorageGCS
+
+            from dotflow import Config
+            from dotflow.providers import StorageGCS
+
+            config = Config(
+                storage=StorageGCS(
+                    bucket="my-dotflow-bucket",
+                    prefix="workflows/",
+                    project="my-gcp-project"
+                )
+            )
+
+    Args:
+        bucket (str): GCS bucket name.
+
+        prefix (str): Key prefix for all stored objects.
+
+        project (str): GCP project ID. Defaults to ADC project.
+    """
+
+    def __init__(
+        self,
+        *args,
+        bucket: str,
+        prefix: str = "dotflow/",
+        project: str = None,
+        **kwargs,
+    ):
+        try:
+            from google.api_core.exceptions import NotFound
+            from google.cloud import storage as gcs
+        except ImportError:
+            raise ModuleNotFound(
+                module="google-cloud-storage",
+                library="dotflow[gcp]",
+            ) from None
+
+        self._not_found = NotFound
+        self.client = gcs.Client(project=project)
+        self.bucket_obj = self.client.bucket(bucket)
+        self.bucket_obj.reload()
+        self.prefix = prefix
+
+    def post(self, key: str, context: Context) -> None:
+        task_context = []
+
+        if isinstance(context.storage, list):
+            for item in context.storage:
+                if isinstance(item, Context):
+                    task_context.append(self._dumps(storage=item.storage))
+        else:
+            task_context.append(self._dumps(storage=context.storage))
+
+        self._write(key=key, data=task_context)
+
+    def get(self, key: str) -> Context:
+        task_context = self._read(key)
+
+        if len(task_context) == 0:
+            return Context()
+
+        if len(task_context) == 1:
+            return self._loads(storage=task_context[0])
+
+        contexts = Context(storage=[])
+        for context in task_context:
+            contexts.storage.append(self._loads(storage=context))
+
+        return contexts
+
+    def key(self, task: Callable):
+        return f"{task.workflow_id}-{task.task_id}"
+
+    def _read(self, key: str) -> list:
+        blob = self.bucket_obj.blob(f"{self.prefix}{key}")
+        try:
+            data = blob.download_as_text()
+            return loads(data)
+        except self._not_found:
+            return []
+
+    def _write(self, key: str, data: list) -> None:
+        blob = self.bucket_obj.blob(f"{self.prefix}{key}")
+        blob.upload_from_string(
+            dumps(data),
+            content_type="application/json",
+        )
+
+    def _loads(self, storage: Any) -> Context:
+        try:
+            return Context(storage=loads(storage))
+        except Exception:
+            return Context(storage=storage)
+
+    def _dumps(self, storage: Any) -> str:
+        try:
+            return dumps(storage)
+        except TypeError:
+            return str(storage)
diff --git a/mkdocs.yml b/mkdocs.yml
index ec58b48a..86788bb2 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -130,6 +130,7 @@ nav:
           - nav/tutorial/storage-default.md
           - nav/tutorial/storage-file.md
           - nav/tutorial/storage-s3.md
+          - nav/tutorial/storage-gcs.md
         - nav/tutorial/provider-notify.md
         - nav/tutorial/provider-log.md
       - Tutorial - User Guide:
@@ -187,6 +188,7 @@ nav:
         - nav/reference/storage-init.md
         - nav/reference/storage-file.md
         - nav/reference/storage-s3.md
+        - nav/reference/storage-gcs.md
       - Instance:
         - nav/reference/task-instance.md
         - nav/reference/context-instance.md
diff --git a/poetry.lock b/poetry.lock
index 6bcc3ff3..1de50c54 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -148,7 +148,7 @@ description = "Extensible memoizing collections and decorators"
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "cachetools-7.0.5-py3-none-any.whl", hash = "sha256:46bc8ebefbe485407621d0a4264b23c080cedd913921bad7ac3ed2f26c183114"},
     {file = "cachetools-7.0.5.tar.gz", hash = "sha256:0cd042c24377200c1dcd225f8b7b12b0ca53cc2c961b43757e774ebe190fd990"},
@@ -172,8 +172,7 @@ version = "2.0.0"
 description = "Foreign Function Interface for Python calling C code."
 optional = false
 python-versions = ">=3.9"
-groups = ["dev"]
-markers = "implementation_name == \"pypy\" or platform_python_implementation != \"PyPy\""
+groups = ["main", "dev"]
 files = [
     {file = "cffi-2.0.0-cp310-cp310-macosx_10_13_x86_64.whl", hash = "sha256:0cf2d91ecc3fcc0625c2c530fe004f82c110405f101548512cce44322fa8ac44"},
     {file = "cffi-2.0.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:f73b96c41e3b2adedc34a7356e64c8eb96e03a3782b535e043a986276ce12a49"},
@@ -260,6 +259,7 @@ files = [
     {file = "cffi-2.0.0-cp39-cp39-win_amd64.whl", hash = "sha256:b882b3df248017dba09d6b16defe9b5c407fe32fc7c65a9c69798e6175601be9"},
     {file = "cffi-2.0.0.tar.gz", hash = "sha256:44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529"},
 ]
+markers = {main = "extra == \"gcp\" and platform_python_implementation != \"PyPy\"", dev = "platform_python_implementation != \"PyPy\" or implementation_name == \"pypy\""}
 
 [package.dependencies]
 pycparser = {version = "*", markers = "implementation_name != \"PyPy\""}
@@ -439,7 +439,7 @@ description = "Composable command line interface toolkit"
 optional = false
 python-versions = ">=3.10"
 groups = ["docs"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "click-8.3.2-py3-none-any.whl", hash = "sha256:1924d2c27c5653561cd2cae4548d1406039cb79b858b747cfea24924bbc1616d"},
     {file = "click-8.3.2.tar.gz", hash = "sha256:14162b8b3b3550a7d479eafa77dfd3c38d9dc8951f6f69c78913a8f9a7540fd5"},
@@ -588,7 +588,7 @@ description = "Code coverage measurement for Python"
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "coverage-7.13.5-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:e0723d2c96324561b9aa76fb982406e11d93cdb388a7a7da2b16e04719cf7ca5"},
     {file = "coverage-7.13.5-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:52f444e86475992506b32d4e5ca55c24fc88d73bcbda0e9745095b28ef4dc0cf"},
@@ -710,8 +710,7 @@ version = "43.0.3"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 optional = false
 python-versions = ">=3.7"
-groups = ["dev"]
-markers = "python_version < \"3.10\""
+groups = ["main", "dev"]
 files = [
     {file = "cryptography-43.0.3-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:bf7a1932ac4176486eab36a19ed4c0492da5d97123f1406cf15e41b05e787d2e"},
     {file = "cryptography-43.0.3-cp37-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:63efa177ff54aec6e1c0aefaa1a241232dcd37413835a9b674b6e3f0ae2bfd3e"},
@@ -741,6 +740,7 @@ files = [
     {file = "cryptography-43.0.3-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:2ce6fae5bdad59577b44e4dfed356944fbf1d925269114c28be377692643b4ff"},
     {file = "cryptography-43.0.3.tar.gz", hash = "sha256:315b9001266a492a6ff443b61238f956b214dbec9910a081ba5b6646a055a805"},
 ]
+markers = {main = "python_version < \"3.10\" and extra == \"gcp\"", dev = "python_version < \"3.10\""}
 
 [package.dependencies]
 cffi = {version = ">=1.12", markers = "platform_python_implementation != \"PyPy\""}
@@ -761,8 +761,7 @@ version = "46.0.6"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 optional = false
 python-versions = "!=3.9.0,!=3.9.1,>=3.8"
-groups = ["dev"]
-markers = "python_version >= \"3.10\""
+groups = ["main", "dev"]
 files = [
     {file = "cryptography-46.0.6-cp311-abi3-macosx_10_9_universal2.whl", hash = "sha256:64235194bad039a10bb6d2d930ab3323baaec67e2ce36215fd0952fad0930ca8"},
     {file = "cryptography-46.0.6-cp311-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.whl", hash = "sha256:26031f1e5ca62fcb9d1fcb34b2b60b390d1aacaa15dc8b895a9ed00968b97b30"},
@@ -814,6 +813,7 @@ files = [
     {file = "cryptography-46.0.6-pp311-pypy311_pp73-win_amd64.whl", hash = "sha256:6728c49e3b2c180ef26f8e9f0a883a2c585638db64cf265b49c9ba10652d430e"},
     {file = "cryptography-46.0.6.tar.gz", hash = "sha256:27550628a518c5c6c903d84f637fbecf287f6cb9ced3804838a1295dc1fd0759"},
 ]
+markers = {main = "extra == \"gcp\" and python_version >= \"3.10\"", dev = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""}
 
 [package.dependencies]
 cffi = {version = ">=2.0.0", markers = "python_full_version >= \"3.9.0\" and platform_python_implementation != \"PyPy\""}
@@ -898,7 +898,7 @@ description = "DNS toolkit"
 optional = true
 python-versions = ">=3.10"
 groups = ["main"]
-markers = "python_version >= \"3.10\" and extra == \"mongodb\""
+markers = "extra == \"mongodb\" and python_version >= \"3.10\""
 files = [
     {file = "dnspython-2.8.0-py3-none-any.whl", hash = "sha256:01d9bbc4a2d76bf0db7c1f729812ded6d912bd318d3b1cf81d30c0f845dbf3af"},
     {file = "dnspython-2.8.0.tar.gz", hash = "sha256:181d3c6996452cb1189c4046c61599b84a5a86e099562ffde77d26984ff26d0f"},
@@ -969,7 +969,7 @@ description = "A platform independent file lock."
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "filelock-3.25.2-py3-none-any.whl", hash = "sha256:ca8afb0da15f229774c9ad1b455ed96e85a81373065fb10446672f64444ddf70"},
     {file = "filelock-3.25.2.tar.gz", hash = "sha256:b64ece2b38f4ca29dd3e810287aa8c48182bbecd1ae6e9ae126c9b35f1382694"},
@@ -1010,6 +1010,219 @@ python-dateutil = ">=2.8.1"
 [package.extras]
 dev = ["flake8", "markdown", "twine", "wheel"]
 
+[[package]]
+name = "google-api-core"
+version = "2.30.2"
+description = "Google API client core library"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"gcp\""
+files = [
+    {file = "google_api_core-2.30.2-py3-none-any.whl", hash = "sha256:a4c226766d6af2580577db1f1a51bf53cd262f722b49731ce7414c43068a9594"},
+    {file = "google_api_core-2.30.2.tar.gz", hash = "sha256:9a8113e1a88bdc09a7ff629707f2214d98d61c7f6ceb0ea38c42a095d02dc0f9"},
+]
+
+[package.dependencies]
+google-auth = ">=2.14.1,<3.0.0"
+googleapis-common-protos = ">=1.63.2,<2.0.0"
+proto-plus = [
+    {version = ">=1.22.3,<2.0.0"},
+    {version = ">=1.25.0,<2.0.0", markers = "python_version >= \"3.13\""},
+]
+protobuf = ">=4.25.8,<8.0.0"
+requests = ">=2.20.0,<3.0.0"
+
+[package.extras]
+async-rest = ["google-auth[aiohttp] (>=2.35.0,<3.0.0)"]
+grpc = ["grpcio (>=1.33.2,<2.0.0)", "grpcio (>=1.49.1,<2.0.0) ; python_version >= \"3.11\"", "grpcio (>=1.75.1,<2.0.0) ; python_version >= \"3.14\"", "grpcio-status (>=1.33.2,<2.0.0)", "grpcio-status (>=1.49.1,<2.0.0) ; python_version >= \"3.11\"", "grpcio-status (>=1.75.1,<2.0.0) ; python_version >= \"3.14\""]
+
+[[package]]
+name = "google-auth"
+version = "2.49.1"
+description = "Google Authentication Library"
+optional = true
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"gcp\""
+files = [
+    {file = "google_auth-2.49.1-py3-none-any.whl", hash = "sha256:195ebe3dca18eddd1b3db5edc5189b76c13e96f29e73043b923ebcf3f1a860f7"},
+    {file = "google_auth-2.49.1.tar.gz", hash = "sha256:16d40da1c3c5a0533f57d268fe72e0ebb0ae1cc3b567024122651c045d879b64"},
+]
+
+[package.dependencies]
+cryptography = ">=38.0.3"
+pyasn1-modules = ">=0.2.1"
+
+[package.extras]
+aiohttp = ["aiohttp (>=3.6.2,<4.0.0)", "requests (>=2.20.0,<3.0.0)"]
+cryptography = ["cryptography (>=38.0.3)"]
+enterprise-cert = ["pyopenssl"]
+pyjwt = ["pyjwt (>=2.0)"]
+pyopenssl = ["pyopenssl (>=20.0.0)"]
+reauth = ["pyu2f (>=0.1.5)"]
+requests = ["requests (>=2.20.0,<3.0.0)"]
+rsa = ["rsa (>=3.1.4,<5)"]
+testing = ["aiohttp (<3.10.0)", "aiohttp (>=3.6.2,<4.0.0)", "aioresponses", "flask", "freezegun", "grpcio", "packaging", "pyjwt (>=2.0)", "pyopenssl (<24.3.0)", "pyopenssl (>=20.0.0)", "pytest", "pytest-asyncio", "pytest-cov", "pytest-localserver", "pyu2f (>=0.1.5)", "requests (>=2.20.0,<3.0.0)", "responses", "urllib3"]
+urllib3 = ["packaging", "urllib3"]
+
+[[package]]
+name = "google-cloud-core"
+version = "2.5.1"
+description = "Google Cloud API client core library"
+optional = true
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"gcp\""
+files = [
+    {file = "google_cloud_core-2.5.1-py3-none-any.whl", hash = "sha256:ea62cdf502c20e3e14be8a32c05ed02113d7bef454e40ff3fab6fe1ec9f1f4e7"},
+    {file = "google_cloud_core-2.5.1.tar.gz", hash = "sha256:3dc94bdec9d05a31d9f355045ed0f369fbc0d8c665076c734f065d729800f811"},
+]
+
+[package.dependencies]
+google-api-core = ">=2.11.0,<3.0.0"
+google-auth = ">=2.14.1,<2.24.0 || >2.24.0,<2.25.0 || >2.25.0,<3.0.0"
+
+[package.extras]
+grpc = ["grpcio (>=1.38.0,<2.0.0) ; python_version < \"3.14\"", "grpcio (>=1.75.1,<2.0.0) ; python_version >= \"3.14\"", "grpcio-status (>=1.38.0,<2.0.0)"]
+
+[[package]]
+name = "google-cloud-storage"
+version = "3.9.0"
+description = "Google Cloud Storage API client library"
+optional = true
+python-versions = ">=3.7"
+groups = ["main"]
+markers = "python_version < \"3.10\" and extra == \"gcp\""
+files = [
+    {file = "google_cloud_storage-3.9.0-py3-none-any.whl", hash = "sha256:2dce75a9e8b3387078cbbdad44757d410ecdb916101f8ba308abf202b6968066"},
+    {file = "google_cloud_storage-3.9.0.tar.gz", hash = "sha256:f2d8ca7db2f652be757e92573b2196e10fbc09649b5c016f8b422ad593c641cc"},
+]
+
+[package.dependencies]
+google-api-core = ">=2.27.0,<3.0.0"
+google-auth = ">=2.26.1,<3.0.0"
+google-cloud-core = ">=2.4.2,<3.0.0"
+google-crc32c = ">=1.1.3,<2.0.0"
+google-resumable-media = ">=2.7.2,<3.0.0"
+requests = ">=2.22.0,<3.0.0"
+
+[package.extras]
+grpc = ["google-api-core[grpc] (>=2.27.0,<3.0.0)", "grpc-google-iam-v1 (>=0.14.0,<1.0.0)", "grpcio (>=1.33.2,<2.0.0) ; python_version < \"3.14\"", "grpcio (>=1.75.1,<2.0.0) ; python_version >= \"3.14\"", "grpcio-status (>=1.76.0,<2.0.0)", "proto-plus (>=1.22.3,<2.0.0) ; python_version < \"3.13\"", "proto-plus (>=1.25.0,<2.0.0) ; python_version >= \"3.13\"", "protobuf (>=3.20.2,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5,<7.0.0)"]
+protobuf = ["protobuf (>=3.20.2,<7.0.0)"]
+testing = ["PyYAML", "black", "brotli", "coverage", "flake8", "google-cloud-iam", "google-cloud-kms", "google-cloud-pubsub", "google-cloud-testutils", "google-cloud-testutils", "mock", "numpy", "opentelemetry-sdk", "psutil", "py-cpuinfo", "pyopenssl", "pytest", "pytest-asyncio", "pytest-benchmark", "pytest-cov", "pytest-rerunfailures", "pytest-xdist"]
+tracing = ["opentelemetry-api (>=1.1.0,<2.0.0)"]
+
+[[package]]
+name = "google-cloud-storage"
+version = "3.10.1"
+description = "Google Cloud Storage API client library"
+optional = true
+python-versions = ">=3.10"
+groups = ["main"]
+markers = "extra == \"gcp\" and python_version >= \"3.10\""
+files = [
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 version = "1.13.0"
@@ -1150,7 +1363,7 @@ description = "brain-dead simple config-ini parsing"
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
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 optional = false
 python-versions = ">=3.10"
 groups = ["docs"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
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 optional = false
 python-versions = ">=3.10"
 groups = ["main"]
-markers = "python_version >= \"3.10\""
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 optional = false
 python-versions = ">=3.10"
 groups = ["code-quality"]
-markers = "python_version >= \"3.10\""
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@@ -2036,7 +2249,7 @@ description = "A small Python package for determining appropriate platform-speci
 optional = false
 python-versions = ">=3.10"
 groups = ["dev", "docs"]
-markers = "python_version >= \"3.10\""
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 testing = ["coverage", "pytest", "pytest-benchmark"]
 
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+name = "pyasn1-modules"
+version = "0.4.2"
+description = "A collection of ASN.1-based protocols modules"
+optional = true
+python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"gcp\""
+files = [
+    {file = "pyasn1_modules-0.4.2-py3-none-any.whl", hash = "sha256:29253a9207ce32b64c3ac6600edc75368f98473906e8fd1043bd6b5b1de2c14a"},
+    {file = "pyasn1_modules-0.4.2.tar.gz", hash = "sha256:677091de870a80aae844b1ca6134f54652fa2c8c5a52aa396440ac3106e941e6"},
+]
+
+[package.dependencies]
+pyasn1 = ">=0.6.1,<0.7.0"
+
 [[package]]
 name = "pycodestyle"
 version = "2.14.0"
@@ -2076,12 +2377,12 @@ version = "2.23"
 description = "C parser in Python"
 optional = false
 python-versions = ">=3.8"
-groups = ["dev"]
-markers = "(implementation_name == \"pypy\" or platform_python_implementation != \"PyPy\") and implementation_name != \"PyPy\" and python_version < \"3.10\""
+groups = ["main", "dev"]
 files = [
     {file = "pycparser-2.23-py3-none-any.whl", hash = "sha256:e5c6e8d3fbad53479cab09ac03729e0a9faf2bee3db8208a550daf5af81a5934"},
     {file = "pycparser-2.23.tar.gz", hash = "sha256:78816d4f24add8f10a06d6f05b4d424ad9e96cfebf68a4ddc99c65c0720d00c2"},
 ]
+markers = {main = "extra == \"gcp\" and platform_python_implementation != \"PyPy\" and implementation_name != \"PyPy\" and python_version < \"3.10\"", dev = "(platform_python_implementation != \"PyPy\" or implementation_name == \"pypy\") and python_version < \"3.10\" and implementation_name != \"PyPy\""}
 
 [[package]]
 name = "pycparser"
@@ -2089,12 +2390,12 @@ version = "3.0"
 description = "C parser in Python"
 optional = false
 python-versions = ">=3.10"
-groups = ["dev"]
-markers = "(platform_python_implementation != \"PyPy\" or implementation_name == \"pypy\") and python_version >= \"3.10\" and implementation_name != \"PyPy\""
+groups = ["main", "dev"]
 files = [
     {file = "pycparser-3.0-py3-none-any.whl", hash = "sha256:b727414169a36b7d524c1c3e31839a521725078d7b2ff038656844266160a992"},
     {file = "pycparser-3.0.tar.gz", hash = "sha256:600f49d217304a5902ac3c37e1281c9fe94e4d0489de643a9504c5cdfdfc6b29"},
 ]
+markers = {main = "platform_python_implementation != \"PyPy\" and extra == \"gcp\" and implementation_name != \"PyPy\" and python_version >= \"3.10\"", dev = "platform_python_implementation != \"PyPy\" and implementation_name != \"PyPy\" and python_version >= \"3.10\" or implementation_name == \"pypy\" and python_version >= \"3.10\""}
 
 [[package]]
 name = "pydantic"
@@ -2467,7 +2768,7 @@ description = "API to interact with the python pyproject.toml based projects"
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "pyproject_api-1.10.0-py3-none-any.whl", hash = "sha256:8757c41a79c0f4ab71b99abed52b97ecf66bd20b04fa59da43b5840bac105a09"},
     {file = "pyproject_api-1.10.0.tar.gz", hash = "sha256:40c6f2d82eebdc4afee61c773ed208c04c19db4c4a60d97f8d7be3ebc0bbb330"},
@@ -2818,7 +3119,7 @@ description = "Python HTTP for Humans."
 optional = false
 python-versions = ">=3.10"
 groups = ["main", "dev", "docs"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "requests-2.33.1-py3-none-any.whl", hash = "sha256:4e6d1ef462f3626a1f0a0a9c42dd93c63bad33f9f1c1937509b8c5c8718ab56a"},
     {file = "requests-2.33.1.tar.gz", hash = "sha256:18817f8c57c6263968bc123d237e3b8b08ac046f5456bd1e307ee8f4250d3517"},
@@ -2996,7 +3297,7 @@ description = "A lil' TOML writer"
 optional = false
 python-versions = ">=3.9"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "tomli_w-1.2.0-py3-none-any.whl", hash = "sha256:188306098d013b691fcadc011abd66727d3c414c571bb01b1a174ba8c983cf90"},
     {file = "tomli_w-1.2.0.tar.gz", hash = "sha256:2dd14fac5a47c27be9cd4c976af5a12d87fb1f0b4512f81d69cce3b35ae25021"},
@@ -3047,7 +3348,7 @@ description = "tox is a generic virtualenv management and test command line tool
 optional = false
 python-versions = ">=3.10"
 groups = ["dev"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "tox-4.52.0-py3-none-any.whl", hash = "sha256:624d8ea4a8c6d5e8d168eedf0e318d736fb22e83ca83137d001ac65ffdec46fd"},
     {file = "tox-4.52.0.tar.gz", hash = "sha256:6054abf5c8b61d58776fbec991f9bf0d34bb883862beb93d2fe55601ef3977c9"},
@@ -3123,7 +3424,7 @@ description = "HTTP library with thread-safe connection pooling, file post, and
 optional = false
 python-versions = ">=3.9"
 groups = ["main", "dev", "docs"]
-markers = "python_version >= \"3.10\""
+markers = "python_version >= \"3.10\" and python_version < \"3.12\" or python_version >= \"3.12\""
 files = [
     {file = "urllib3-2.6.3-py3-none-any.whl", hash = "sha256:bf272323e553dfb2e87d9bfd225ca7b0f467b919d7bbd355436d3fd37cb0acd4"},
     {file = "urllib3-2.6.3.tar.gz", hash = "sha256:1b62b6884944a57dbe321509ab94fd4d3b307075e0c2eae991ac71ee15ad38ed"},
@@ -3271,9 +3572,10 @@ type = ["pytest-mypy"]
 
 [extras]
 aws = ["boto3"]
+gcp = ["google-cloud-storage"]
 mongodb = ["dotflow-mongodb"]
 
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.9.0"
-content-hash = "118e109fd3d1eeed79b34beda12069d1db1f8c28d5e14e48105ba0b618f5e659"
+content-hash = "766cc75e4df56de2ede225825d0feb8eb93bbe125bc3d1f764f48ce6682cab17"
diff --git a/pyproject.toml b/pyproject.toml
index 467d90b8..4bd03bda 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,6 +35,7 @@ Documentation = "https://github.com/dotflow-io/dotflow/blob/master/README.md"
 [project.optional-dependencies]
 mongodb = ["dotflow-mongodb"]
 aws = ["boto3"]
+gcp = ["google-cloud-storage"]
 
 [tool.poetry]
 name = "dotflow"
diff --git a/tests/providers/test_storage_gcs.py b/tests/providers/test_storage_gcs.py
new file mode 100644
index 00000000..1cb899db
--- /dev/null
+++ b/tests/providers/test_storage_gcs.py
@@ -0,0 +1,137 @@
+"""Test StorageGCS"""
+
+import unittest
+from json import dumps, loads
+from unittest.mock import MagicMock, patch
+from uuid import uuid4
+
+from dotflow.core.context import Context
+from dotflow.core.task import Task
+from tests.mocks import action_step
+
+BUCKET = "test-dotflow-bucket"
+PREFIX = "dotflow/"
+PROJECT = "test-project"
+
+
+class TestStorageGCS(unittest.TestCase):
+    def setUp(self):
+        self.mock_client = MagicMock()
+        self.mock_bucket = MagicMock()
+        self.mock_client.bucket.return_value = self.mock_bucket
+
+        patcher = patch(
+            "dotflow.providers.storage_gcs.StorageGCS.__init__",
+            return_value=None,
+        )
+        patcher.start()
+        self.addCleanup(patcher.stop)
+
+        from dotflow.providers.storage_gcs import StorageGCS
+
+        self.storage = StorageGCS()
+        self.storage.client = self.mock_client
+        self.storage.bucket_obj = self.mock_bucket
+        self.storage.prefix = PREFIX
+        self.storage._not_found = Exception
+
+    def test_storage_gcs_instance(self):
+        self.assertEqual(self.storage.prefix, PREFIX)
+
+    def test_post(self):
+        expected_value = {"foo": "bar"}
+        mock_blob = MagicMock()
+        self.mock_bucket.blob.return_value = mock_blob
+
+        self.storage.post(key="test", context=Context(storage=expected_value))
+
+        self.mock_bucket.blob.assert_called_once_with(f"{PREFIX}test")
+        mock_blob.upload_from_string.assert_called_once()
+        uploaded = mock_blob.upload_from_string.call_args
+        data = loads(uploaded[0][0])
+        self.assertEqual(loads(data[0]), expected_value)
+
+    def test_post_many(self):
+        expected_one = {"foo": True}
+        expected_two = {"foo": False}
+        mock_blob = MagicMock()
+        self.mock_bucket.blob.return_value = mock_blob
+
+        input_value = Context(
+            storage=[
+                Context(storage=expected_one),
+                Context(storage=expected_two),
+            ]
+        )
+
+        self.storage.post(key="test", context=input_value)
+
+        uploaded = mock_blob.upload_from_string.call_args
+        data = loads(uploaded[0][0])
+        self.assertEqual(loads(data[0]), expected_one)
+        self.assertEqual(loads(data[1]), expected_two)
+
+    def test_post_overwrites_existing_key(self):
+        new_value = {"foo": "baz"}
+        mock_blob = MagicMock()
+        self.mock_bucket.blob.return_value = mock_blob
+
+        self.storage.post(key="test", context=Context(storage=new_value))
+
+        uploaded = mock_blob.upload_from_string.call_args
+        data = loads(uploaded[0][0])
+        self.assertEqual(len(data), 1)
+        self.assertEqual(loads(data[0]), new_value)
+
+    def test_get(self):
+        expected_value = {"foo": "bar"}
+        mock_blob = MagicMock()
+        mock_blob.exists.return_value = True
+        mock_blob.download_as_text.return_value = dumps(
+            [dumps(expected_value)]
+        )
+        self.mock_bucket.blob.return_value = mock_blob
+
+        result = self.storage.get(key="test")
+
+        self.assertIsInstance(result, Context)
+        self.assertEqual(result.storage, expected_value)
+
+    def test_get_many(self):
+        expected_one = {"foo": "bar"}
+        expected_two = True
+        mock_blob = MagicMock()
+        mock_blob.exists.return_value = True
+        mock_blob.download_as_text.return_value = dumps(
+            [dumps(expected_one), dumps(expected_two)]
+        )
+        self.mock_bucket.blob.return_value = mock_blob
+
+        result = self.storage.get(key="test")
+
+        self.assertIsInstance(result, Context)
+        self.assertEqual(result.storage[0].storage, expected_one)
+        self.assertEqual(result.storage[1].storage, expected_two)
+
+    def test_get_nonexistent_key(self):
+        mock_blob = MagicMock()
+        mock_blob.download_as_text.side_effect = Exception("NotFound")
+        self.mock_bucket.blob.return_value = mock_blob
+
+        result = self.storage.get(key="nonexistent")
+
+        self.assertIsInstance(result, Context)
+        self.assertIsNone(result.storage)
+
+    def test_key(self):
+        workflow_id = uuid4()
+
+        task = Task(
+            task_id=0,
+            workflow_id=workflow_id,
+            step=action_step,
+        )
+
+        result = self.storage.key(task=task)
+
+        self.assertEqual(result, f"{workflow_id}-0")