Would those work for the rears of the GS? (RWD)

 

Bumpity bump bump bumpity

 

https://tiresize.com/calculator/

If you enter both tire sizes youll notice that the tire you want to install is a lot taller 2.5" taller. Although it may fit, theres a big chance of you rubbing on that tire. I wouldnt take that risk plus the speedometer will read funny

Try to find another size in a closer to oem

 

I put on a taller tire and thinner tires for winter on one of my neons. works great.
However you may want to check clearances. I had to "clearance" the rear struts for the taller tire.

 

So a tire that's nearly 3" taller would not be ideal....damn. Found a really good deal on a set of new Blizzaks