I have a friend that's giving me a set of RR rims. The bolt pattern on the rims are 5x120. I'm curious to know if this bolt pattern will fit my 07 GT without any issues.

 

Would also be curious about diameter, width, backspacing and the offset, for those are also rather important, but first off, the bolt pattern for the S197 is 5 x 4.5", or 5 x 114.3mm, so they won't work with the 5 x 120mm pattern anyway.

You should totally get them, sell them, and then get some other rims that will work.