I have had Granville Island beer many times. Unfortunately the Beer Store doesn't sell it in Ontario. At least I haven't seen it. Maybe the LCBO might have some.
Last summer I was in Vancouver, and went to Granville Island, to enjoy the market, the waterpark and the shops & buskers. I also bought a Granvill Island Commemorative brew t-shirt...
the Gastown Amber ale is soooo goood!
Their site:
http://www.gib.ca/