To make this Mexican White Cheese Dip gluten free, first confirm that the white American cheese you are using is labeled gluten free, since brands can vary. You should also check the green chilies and all seasonings, especially the garlic powder, onion powder, and cumin, to be sure they do not contain any fillers or anti-caking agents with gluten. If you are serving the dip with chips or using it as a topping, make sure those items are certified gluten free as well. The dip itself is naturally very close to gluten free, so it usually only takes a careful label check to keep it safe.