Below is a picture of both my 1988 GTA Notchbacks. Both are original GTA Notchbacks with the proper RPO indicating so. While there is conflicting data on the exact production figures for these rare cars, Pontiac's official answer, as shown here, is 718. Outside of the unique fiberglass hatch, straight decklid spoiler, and high-back rear seats, these cars share the same features as the regular GTA.