Apparently I HAVE driven both cars stock (07 and 09 G6 GT's and several stock GP GTP's) and there is no comparison, especially down low. It would be a better race for a stock N/A GP GT. A stock GP GTP makes around 270-280 torque at the wheels. That 3.5 liter (not 3.6) VVT V6 is FAR cry from that. Hell even the G6 GTP's struggle to get into the high 14's stock. Most are 15's. And they need nitrous to run mid-high 13's.