Sounds like your brother-in-law is really happy with his new family member. Glad to see he's having fun with it......just be careful out there. Perhaps you will have to add a Mopar to your collection in the future.
It seems as if Mustang owners are always trying to get me to street race them (do all my racing on the strip). As for the GTO, I hear that they are hot....and may just give your brother-in-law a run for his money. Keep us posted.