'07 GTP had the same drivetrain as the GXP without the gay wing and appearance kit. I have a 2006 GTP 6spd which has the LZ9 3.9L pushrod motor instead. 2008+ they didn’t offer the GTP, just the GT (3.5L pushrod), GXP (3.6L DOHC) and the base model shitboxes.
Still the same car. Have fun with the brakes, they are junk. On my third set of rotors/pads @ 60k… Expect the seat back adjustment handles to break off and expect retarded sounding clunks in the front suspension within 40k miles.
I wouldn’t worry about the warranty, it’s a GM and the platform itself still alive in other forms.