Set half the burners on a gas grill to high heat setting, cover, and preheat for 10 minutes. When the grill is hot, remove the steak from the bag and place it on the hot grill. Let steak cook, covered, for about 5 minutes. Turn and cook for about 3 to 4 minutes more. Remove meat to rest on a cutting board, covered with aluminum foil, for about 5 minutes. Slice very thin against the grain, serve, and enjoy.