We went here to get a quick bite for my son and daughter (both Celiac) but did not have a very good experience. My wife ran inside and ordered two relatively easy gluten-free meals (a baked potato and a grilled cheese sandwich) to go.
The sandwich had an unwrapped chocolate chip cookie laying inside the container with the sandwich. Luckily, my wife checked it before we left and had them remake it. Unfortunately, they didn't bother to toast the new sandwich so my daughter had two slices of Udi's bread with a slice of cheese.
My son's potato was slightly better, but the potato had some stray chips inside of its container. Since his meal didn't come with chips, it was a bit concerning where they came from and what other contamination was present.
They have the gluten-free options, and I imagine if you stayed on top of them or got the right person to serve you then you may do ok (particularly if you are not Celiac), but overall it caused enough concern that we most likely will not return.
— Not very
— Gluten-free items are marked on the main menu
— Some
— Average