Gluten sensitive is what their menu states. I wouldn't say they are free from cross contamination but very good gf buns for burgers! Bun was perfect proportions, didn't fall apart, or get weird and pasty. I had the grilled salmon but had a reaction to I believe the rice they offered me which probably wasnt gf even though I told them I had celiacs and needed gf. Otherwise great service and excellent gf bun and burger! Would return for burger!
I didn’t get sick, but despite ordering a GF bun on my burger and stressing that I needed to be gluten-free, I was served my burger on a pile of unsafe French Fries. The waiter then walked away, forcing me to flag her down to confirm that I could not, in fact, eat those.
I ate the burger anyway, and they brought me a side of broccoli on the house, but it was definitely a stressful experience.
If you keep walking down the gates of Concourse C, there’s a Shake Shack that has (as of this writing) fewer, but better reviews.