The staff have been very knowledgeable and helpful with all my Celiac gluten precautions and questions. They have a gluten free bun, so most burgers can be made gluten-free. I prefer to order at the counter register so I can talk to a staff member and clarify preparation process and ingredients. I always have to ask those things in case something has changed, and they are so patient and nice. Seriously, the customer service has been fantastic.
There's a shared fryer, so I can't have the fries. And the shacksauce has spices and natural flavors without origin, so I skip that. But the gluten-free bun hasn't fallen apart on me and the burgers are delicious, so that's a win!
If you have gluten issues and are craving a quick and yummy burger, I definitely recommend this location of Shake Shack.