Have not seen any brands on island but in Montreal we have a delicious beer called glutenberg, I have no issues with gluten but that brand is very good and I buy it regularly just for the taste. Sarasin is my favourite.
Glutenberg is my wifes favorite! She has a severe gluten allergy. Taking a shot in the dark that someone may have come across some somewhere on island. I'll also check with Jeannie from Shop-n-Drop. We spend a couple of weekends a year in Montreal (our favorite city) as we are only a couple of hours away. We've even found gluten free bakery on St. Laurent!