Hi, Luya I see that you maintain GIMP 2.7.x packages in your own fedora repo. Have you talked with Fedora GIMP package maintainer to provide GIMP 2.7.x packages in Fedora rawhide or fedora-updates-testing repos?
Please join in this RFE - https://bugzilla.redhat.com/show_bug.cgi?id=551837
Cheers, Valent.