Sorry...I wasn't able to get very close...he had it parked really close to two junkers (who does that?? you're supposed to park waaaaay out in the back )
Anyway, my girlfriend was yelling at me to stop gawking..so I didn't get too close...sorry guys =(
It was black, and the 18" rims were beautiful...and it was definitely a GTP. That's all I got. It could have even been a convertible (top up) for all I know...I really only saw the back and rear panels.