This is our go-to place for gluten-free pizza in the Glenwood area. The staff are all super-friendly and we've never had problems with cross-contamination.
I don't know how careful they are about cross-contamination, but I do know that I ordered a gluten-free pizza and did not get sick!! That earns at least a four-star review in my book, as I tend to be very sensitive. The pizza was not the best I've ever had; the sauce was unexpectedly spicy, but I would try it again if we were in the area.