They have a separate GF menu with lots of options including fried calamari!
As an update to my December 2015 review, I went back in May 2016 and was rather disappointed. They downsized both the regular and GF menus. The GF options are a lot more limited now. The fish and chips, fried calamari, and fries were no longer on the GF menu and I left feeling sick after eating a chicken sandwich on a GF bun.