It CAN be done. should it be done? No, the GD wing is meant for the GD's not the GC's. The wing is toooooo wide for our cars and it just looks like garbage IMO. Go with a V5/6, RB5, 22B, or P1 style wing! Just my .02 though.
Keep checking the classifieds! One comes up once in a while. If you'd like a new oem authentic...make sure you have some deep pockets. IIRC, they were going for a grand from the Motherland.
Or check with the vendors on this site! They do come up, too!