In 2004, Pontiac unveiled a concept at SEMA called the G6 GXP. It sported exterior styling reminiscent of the recent GTO, Bilstein suspension, a 276-hp V6, and a six-speed manual.

With Pontiac's new performance GXP designation, you could find Solstice models, the G6, and the short lived G8 also with a GXP trim.

Prior to GXP, Pontiac's Grand Prix performance model was called the GTP. GTP stands for Grand Touring Prototype, and is derived from an IMSA (International Motor Sports Association) class of racing.