git-difftool or more commands support?

[WinterArch]

Is your feature request related to a problem? Please describe.

$git difftool --tool=gitui
Viewing (1/2): ...
Launch 'gitui' [Y/n]? Y
Unknown merge tool gitui

Describe the solution you'd like
A shortcut(?) of gitui-status[1], then we can alias this like guid or some things.

Describe alternatives you've considered

gitui --status
gitui -d

Additional context
Just COOL!

[extrawurst]

@WinterArch can you clarify more what you want?