I'm also a fairly young (just turned 27) gay survivor in the SF Bay Area, and I say with pretty good confidence that there are no groups specifically for people who are all three of those things.
Rocky Mtn. hit all the bases pretty well if you want something similar, like a support group for young gay guys, or for abuse survivors of any kind, etc.
I suppose *I'm* the closest thing to a group for young gay male survivors in the Bay. PM me if you want to hang out some time.