Prices shown for the used 2006 Pontiac G6 Coupe 2D GTP with NaN miles are what people paid to buy this vehicle or what people received when trading in this vehicle at a dealer. Edit options.

Pontiac GTP is believed to stand for Gran Turismo Prototipo or Grand Touring Prototype, based on one of the International Motor Sport Associations (IMSA) GTP racing classes. Also another familiar ...