Just an FYI in case you weren’t joking about not knowing it: the I stands for intersex, the A stands for asexual and aromantic (not “ally”, dammit, but that’s a whole different can of worms). The most complete acronym to use would be QQUILTBANGPIPE, but even I don’t know all those terms (U?E?). Better suggestion that I’ve seen floating around: “the SAGA movement/community”, with that acronym standing for “Sexuality And Gender Acceptance” whilst alluding to a long epic story of the struggle for equal rights. Cool? Cool. If that’s too many letters, still, then go with GSM (Gender & Sexuality Minorities).