The problem is the side sill. But strategically placed in the wheel wells are pry-off plastic points that reveals holes on the fender pre-drilled and paint protected. ready to accept a MZ5 OE splash guard. Only thing is there is none for the GT.
So just go to the nearest Canadian tire, and get an off the shelf splash guard, you have do to some trimming. I suggest to just make it flat and avoid leaving part of that can rub on the side painting. Splash guard regularly hit the grarage ramps and speed bumps and they move and rub. happened to me.
for mounting screw, I used those drywall plastic mounting thinges. shove the plastic 'nut' into the predrilled holes, and got a stainless steel screw to mount the splash guard.