GBTL Share definition Flag Acronym for Gay, Bi-Sexual, Transgender, and Lesbian individuals. "The two-hour synposium dealt with GBTL teens and their current family and societal relationships as they prepared to express their sexual preferences publicly." GBTL by Joop August 30, 2008 0 0 Get merch Get the GBTL mug. Buy Now — $32.95 See more merch
