I knew the fronts were bigger. That wasn't really in question. The confusion there came from when I called the first dealership, I talked to some dumb guy that said the rotors on the GS and the GSX were the same. I didn't ask about the GST. We knew that the GST were smaller. And we knew that the GSX were bigger. But when the guy at the dealership said that the GS were the same size as the GSX, it mads us raise a brow in confusion. You would expect someone at the dealership to know what they are talking about, or at least have the tools availible to give the right information.
The part that we were really in question about was the rear GSX brakes. Some people say that they are the same. Some people say they are different. We know that the GSX rear calipers are the same single piston caliper that the the rest of the models have. I would assume that the rotors would be the same aswell. There are alot of people that support that assumption. But there are some rather well informed people that say that the rear GSX rotors are larger than the rest. According to the dealerships, they are the same.

I'm wondering if people just thought the rotors were bigger so they ended up with two sets of front rotors thinking that it was a front set and a rear set. They just had to get the GSX mounting hardware to mount the calipers where they needed to be to fit. At that point, the mounting hardware was probably two front sets, too. Just no one noticed.
If I got the whole swap and the rotors were all the same size, I wouldn't think twice about it because it would make sense that the 4wd GSX would have bigger brakes all the way around. But at the same time, I doubt Mitsubishi would have put the same calipers on different rotors. That wouldn't really be that cost effective when it came down to parts and manufacturing.

Hopefully we can get this all straightened out.