LS4 Performance - quick tire size question-gxp

found a pair of nittos for sale locally
305/35ZR 18
will they fit front gxp rims??

I would not recommend putting a 305mm (12") wide tire on a 8" rim. 275mm (10.8") is about as large as I would go, and there are still people who will say they are too large for a 8" rim. I'm not even sure the 305 will fit upfront without running.