They don't have much that is gluten-free, and i don't see where they customize anything. It's cafeteria style service. You order set items from a kiosk then pick them up at the counter. What they offer is marked on the menu. Very few things are both gf and dairy-free or gf and vegan.
They offer a salad bar that you can choose options from, thus can be gf. It was very fresh, though very basic. The only proteins offered were diced ham, boiled egg, and cheese. And the foods were scattered all through the different trays, so not a controlled space. You're better off to go to the market across the lot and pull together your own safe foods if dealing with food issues.