They have a very thoughtful GF menu listing all your options. It's actually super careful (obviously a good thing overall) -- for example, they didn't think I should have the blue cheese on my salad given the cellulose used as an anti-caking agent, but I felt it would be fine (and it was), as cellulose is typically gluten free. Not the most amazing food but the view is swell and it seems like they are very thoughtful about cross-contamination.
— Very
— Separate gluten-free menu
— Some
— Average