My wife is celiac and we've eaten at Tasty Menu. It's on 17th Avenue SE, I don't remember the actual address, but the area isn't exactly the ritziest....
Tasty Menu is great - I take the wife there whenever she gets a hankering for pizza - They make a thin crust pizza, which I think is excellent - the crust doesn't taste like chalk... Also, they make some pretty good desserts - I had the chocolate cake one time, and I really couldn't tell that the cake was gluten free. Plus the prices aren't that expensive, so you could have a pretty good meal for two for under $30.
They have a website:
http://www.atastymenu.ca/