Personally I don't worry about cross contamination so I cannot speak of it. But they had many gluten sensitive options and I got a burger with a gf bun and it was so good! The burgers were not marked as a gf option but when I asked if they had a gf bun she said yes. The menu does specifically state to ask about their gf options.
— Gluten-free items are marked on the main menu
— Most/All
— Excellent