To make this Chicken Bubble Biscuit Bake Casserole gluten free, use certified gluten-free refrigerated biscuit dough or a homemade gluten-free biscuit dough. Replace the cream of chicken soup with a gluten-free cream of chicken soup. Verify that the ranch seasoning mix, bacon, sour cream, cheddar cheese, cooked chicken, and all packaged ingredients are labeled gluten free. Use clean cookware, utensils, and baking dishes to prevent cross-contact with gluten-containing ingredients.