Prepare grill. Place 1 crust on grill rack coated with cooking spray; grill 3 minutes or until puffy and golden. Turn crust, grill-mark side up; brush with 1/2 teaspoon oil. Top with half of Parmesan, artichokes, and crabmeat. Cover and grill 3 to 4 minutes or until cheese melts and crust is lightly browned. Repeat with remaining crust and toppings.