Two in our family have Celiac. They had a bacon cheeseburger on a GF bun and Mahi Mahi on a GF bun. Their online menu shows what to leave off for the items to be GF. Fries are GF without salt and fried in a dedicated fryer.
They clean the prep area, put on clean gloves, and brought the GF food out on a separate tray in closed plastic containers.
— Very
— Separate gluten-free menu
— Some
— Excellent