This location is a quick walk from the main train station (<5 min, turn left when you come out) and has certified GF pizza crust. Dozens of pizza options to pick from. Crust in this case was a little undercooked on one of our two pizzas, but this is the best quick GF option I’ve found in Venice and pretty good. They also have a few GF entrees listed (meat dishes) and a few GF pasta options!