To make sure that this Ground Turkey Sweet Potato Skillet is gluten-free it's important to be careful when selecting your ingredients. Make sure the ground turkey doesn't have any additives that could contain gluten. Always check the labels, on your spices and seasonings as some blends might have wheat-based fillers. Also, use a cooking oil that is specifically labeled as gluten-free to be safe. When choosing mozzarella cheese go for a brand that clearly states its products are gluten-free because some pre-shredded cheeses may have caking agents with gluten in them. With these considerations in mind, you can enjoy this dish without any concerns.