I think you're confused. You're talking about the G6 which is a TOTALLY different car. But still, no supercharger.
Oops, lol
THe S/C G5, my guess is it did have a Cobalt S/C on it or something similar anyways. Why did Pontiac even make the G5 though? It seems even less popular than the Cobalt. In my opinion Both cars are cool.