Ask about gluten free options. The owner of the restaurant will care for your needs and tell you all your options. The options range from different sort of meats(without marinade) , vegetables and rice. Now it's up to you and your freinds so either split the grill so you don't mix marinaded with non marinaded meat or keep it completely gluten free.
— Somewhat
— No gluten-free information on the menu
— Most/All
— Excellent