hmmm interesting, i bought my 07 GT/CS and it has the same rear spolier as a normal GT and no hood scoop. It has the 18 inch polished aluminum wheels, upgraded exhaust, supposedly an upgraded upper intake plenum, and a beefed up suspension system
you can get the car anywhere but is special ordered by a dealer. by the way, if you happen to damage a bumper and have it replaced you may want to inform your local parts guy it is a " california special " and maybe even get him the part numbers. my bumpers got wrecked and here i am 6 weeks later still not driving it!!!
i will post pictures asap of my GT/CS note my bumpers and rear spoiler are different, i found Cervinis....
The California special is not available in just California. I live in Pa. and just bought one a week and a half ago.
As far as differances, Trim kit makes it sit (or look like) its sits lower. The rear bumper has a differant look,They call it a diffuser.
The interior is pretty much the same as far as looks,but differant color option. My dasdboard has a sort of carbon colored snake skin look to it...pretty cool looking.
I didnt take any interior pictures as of yet,but here are a few exterior pics. The stripe going down the sides says "GT/CS" its in a smoky gray color that blends in with the paint so its really hard to make out at some angles.