Professional cooks will 99.9% of the time have French toast batter prepared, meaning, eggs, some sort of milk, and some sort of flavoring, as in cinnamon and spice. (which is all gluten-free.) If you bring your own GF bread, all they have to do is dip it in the batter, throw it on the flat top, and you’ve got yourself brunch to go along with your loved ones and the rest of the “tolerant” crowd.
Feeling limited? Never!! Bring in a few slices of your own bread, and leave the cooking to the pros while you sip on mimosasbloodymaryscoffee with friends.