There is a GF crust option on the menu, (only one size and thin) however it holds together well and tastes good. These folks also have several hard ciders on their beer and wine list. Service is good and prices are fair. There is a small up charge for the GF crust. I am a repeat customer.
There is another location in Belleville. My relatives like to eat here-- the New Glarus location is convenient for them-- so I was glad they have gf pizza, even if it is only one size, 12". I didn't want to be eating a salad while everyone else ate pizza! (Not sure if there's any other gf paces in town. There's local Swiss restaurants, and several bar and grills, Culvers and Subway. The only other pizza place, Ticino Pizza, just changed hands so their website is under construction and I can't find a menu.)If you want to find the price of the 12" at Sugar River Pizza it is listed on their regular menu under "Build Your Own, Pick Your Crust." The crust was thin but held together well. It was dark brown and crispy around the edges. My brother and I almost polished off all 8 slices. My other brother, who is not gf, was still hungry after eating up the regular pizza, so he had the last of the gf pizza. He said it was ok. That means it was good.