The Gateway Arch National Park has a small cafe in the underground museum. There were a few gluten free snacks (Cheetos, potato chips) and candy (Reese’s peanut butter cups) as well as soda. There was a yogurt cup and salad that appeared GF. I’d recommended packing your own lunch/snacks.
— Somewhat
— No gluten-free information on the menu
— Not Much
— Average