While I did not ask the waitress or anybody about gluten free item, Pho uses rice noodles (so naturally GF) and there is an option for noodle-less pho as well. Very tasty, quick service, and great for a cold day!
Quality & Quantity
How much of the menu is available gluten-free?
— Some
How would you rate the taste and quality of the gluten-free food you tried?