My GP is a base N/A and im pretty sure the only G6 that will beat it stock would HAVE to be the GTP. The GT, Base which ever thats not the GTP or the GXP will loose.
For the topic nice kill bro and im pretty sure the guy said FU and then was wishing he had got the GTP version or the GXP lol.
IMO GP > G6 and GP > Grand AM