At a guess
Bumper
Grill
Side skirts
Rear bumper
Wheels
I'm going to be helpfull so that he might help me out with the parts that I'd like, so to follow on from Rhyso's list
Front bumper
Front bumper grilles
Front foglights (inc loom, switch and coding)
Front grille and GTD badge
Side cill mouldings
Rear bumper
Tailgate spoiler
Rear privicy glass
Rear GTD badge
Twin outlet exhaust with chrome tips
15mm lower suspension
Wheels
I'm sure others will come up with some other parts, but if you have to pay for all that, plus painting, plus fitting, it would probably add up to the price to change for a proper GTD anyway.