Mix the salt, pepper and garlic salt together
Pre-heat your grill to 300-325 degrees
Rinse and dry the wings, then evenly coat with the olive oil
Toss the wings in a large mixing bowl with the rub mixture
Add wings to the grill cooking each side until lightly crisp (5 mins per side)
(optinal step) turn up the heat to get additional charring on the wings
Melt the butter and mix in the parsley, garlic, and parmesan
Toss the wings and enjoy!