Do T wheel lugs fit GNX rims?

I assume you have the lug nuts with the stainless covers made on the nuts. Yes they will fit. :) The GNX/GTA's had lug nuts with separate black plastic covers, but your stockers will work.
Spend the extra money and get the GTA lugs for your GNX replica rims. Torque them to 80-85 ft-ibs. Was told that when I talked with the tech guy at Classic Industries. They GTA's lugs have a nice oval backing to them to seat into the rim properly. I tried the stock GN lug nuts and the corners of the lug started to dig into the rim when I tightened. Just my .02

Mike Banas
Good point about the seat angle. The externally threaded lugs are actually quite common on new GM cars.