yeah man i owned a GTS and traded it in like a year ago. mine was the silver and was the intro year(2000). car was alot of fun. but no there was really no room under the seats at all to do anything under them. the only other place would be the trunk. but in that car theres an armrest to store stuff and the glovebox was of a decent size. looks good to me man. i like how you turned the sunglass compartment into where the screen goes. looks good.
The best part about the car was when it was hot out, I could put a mountain dew bottle propped up at the inner drivers side vent and cool it down with the aircon. lol. ahhh memories.