i have a 2004 grand prix gt1 and i've recently been looking for some aftermarket wheels, but there not much in the 5x115 bolt pattern. does anyone know if the 5x114.3 bolt pattern will fit?

5x114.3 is a smaller bolt pattern by .7mm and should still be enough that it makes it not fit quite right. you need to find 5x115 for them to work. it seems odd that you can't find much in 5x115 because that is a bolt pattern that has been around for a while now. so keep looking for them they are out there.