Hi Valent,
Following the success my Gimp 2.7. repo had, the Fedora Gimp
maintainers created repository called Gimp Unstable[1] which I
recommend to provide feedback and bug report to upstream. You can view
full details on mail list[2] about porting Gimp to either rawhide or
testing repo. My repo will still be available until then.
[1]
http://repos.fedorapeople.org/repos/nphilipp/gimp-unstable/
[2]
http://lists.fedoraproject.org/pipermail/devel/2011-September/156359.html