$ curl cheat.sh/
# gimp
# GNU image manipulation program.
# See also: `krita`.
# More information: <https://docs.gimp.org/en/gimp-fire-up.html#gimp-concepts-running-command-line>.

# Start GIMP:
gimp

# Open specific files:
gimp path/to/image1 path/to/image2 ...

# Open specific files in a new window:
gimp --new-instance path/to/image1 path/to/image2 ...

# Start without a splash screen:
gimp --no-splash

# Print errors and warnings to the console instead of showing them in a dialog box:
gimp --console-messages

# Enable debugging signal handlers:
gimp --debug-handlers

$
Follow @igor_chubin cheat.sh tldr