Any questions, concerns or suggestions regarding the content or functionality of GIMP Gate can be submitted by PM (contact community administrator/maintainer), or by leaving a comment on this entry here.
Gimp doesn't have any official support like paid software since it's an open source project that's developed and maintained by volunteers. What you can do is ask other users for help, like in this community (you need an account to post to this community) or other user forums.
Re: Can't contact gimp?!
That said, gimp.org provides a number of mailing lists and IRC channels where you can ask for help.