I had their GF 12" pizza called "The Works". The pizza was a nice thin crust, fairly good sauce, crunchy green peppers and onions. The crust actually was very tasty, good chew...probably the BEST GF pizza I have had since having to go GF. I was traveling and it's been several years since I visited Red Robin. It was one of the few places near my hotel that was still open for dinner. I would have probably gotten one of their hamburgers on a GF bun with fries, but seeing the pizza options on the menu I decided to give it a try. Sure glad I did. Cost-wise, it was nearly $19. There are other GF pizza options for less. The server was very helpful about GF choices.
— Very
— Separate gluten-free menu
— Some