The GNU Image Manipulation Program (GIMP) is not available in the Graphics menu.
Workaround: Perform the following steps.
Open a terminal window.
Edit the /usr/share/applications/gimp-2.0.desktop file.
Change the Exec and TryExec lines to add the full path to the GIMP binary:
TryExec=/usr/sfw/bin/gimp2.0 Exec=/usr/sfw/bin/gimp-remote-2.0 %u |