When asked about preparing pizza in separate space, they said they would do their best but no guarantees.
Only gf option is gf crust... and it was like fancy cardboard. I have had many gf crusts, and this was the worst. Only plus is it did not make me sick. However, if you are extremely sensitive to gluten, they did not guarantee any safety precautions.
I unfortunately have not had the GF pizza yet but I know they do offer one.