GCDA Share definition Flag (Group Chat Displays of Affection). Very similar to PDA, but within a group chat. May include excessive compliments, hearts, and affection. Lachy and Hayley's GCDAs are SO disgusting it makes me want to kick them off the group, ugh. GCDA by 45lobsters September 17, 2018 0 0 Get merch Get the GCDA mug. Buy Now — $32.95 See more merch
