Place meat in a large ziplock bag and cover with the marinade. Refrigerate at least 1 hour. Overnight is better.
Line a 9 x 13 baking pan with foil. Make the foil big enough so you can fold over the top and seal.
Place the meat on the foil and season with garlic powder, salt, pepper and creole seasoning.
Wrap the foil over the top and seal. Bake for 2 hours at 350 degrees.
While squirrel is cooking, pre-heat your grill.
When squirrel is done, remove it from foil and place on grill. Baste with bbq sauce.
Grill over medium heat until sauce starts to get sticky. Do not overcook! you don't want the meat to get tough!
Remove from grill and serve with your favorite side dishes.