Gimp is the most Gnomish module and the father of GTK. GTK (Gimp Tool-Kit) created in 1997 (before Gnome) to facilitate the development of GIMP. The same year (1997) that Gimp (which released in 1996 -v0.54) became part of GNU Project.
Sixteen years later, Gimp with 2.8.2 release, makes it to native run in the most copyrighted and restricted platform. Great news for GTK, for Open Source and of course for Mac users!