Buick Gnx for GTA 4 0 Buick GNX NT 0 Buick GNX E-Sport 0 Buick GNX OSR 0 1991 Buick GNX 0 Buick GNX GST 0 Buick GNX 80S 1 1987 Buick GNX V1 1 Buick GNX 1987