The 17X8-35 will work perfect on the GT. The stock rims are a 17X6-35 and on the GT vert, 17X7-35. But since you are going 8" wide, go for the 235/45/17. They will fill the whole wheel well as good as you can without using wheel spacers. I run 225/45/17 on my GT vert' which is as big as I can really go on my 7" wide wheels.
