G.M.S Share definition Flag One claiming to have "Grown man Status"... One's swagg must be high to claim "G.M.S" I don't have to take that am G.M.S!! i got that dangerous swagg G.M.S by G-Juice May 8, 2010 0 0 Get merch Get the G.M.S mug. Buy Now — $32.95 See more merch