the 98 gs300 doesn't have projector the 97 does but they're halogen
imo if you are going to do a retrofit go with a xenon projector
you can retrofit a TSX projector they're a good size and they have a lot of performance on light once you color moded with clear lenses your pattern will look like this
or go with FX-R you can buy them at http://www.theretrofitsource.com/