I would suggest putting that as an accomidation you'd need for res, that way you can be in apartment style and thus make your own food.
Most, if not all of the "starches" (save for fries and rice) will have some sort of wheat in them....which means you may not have that many options if you are not cooking for yourself. I think Bridges (the alternative lifestyle eatery (Vegan, Veg, Halal, Kosher) has some rice pasta, but to be honest I forget. I'm also kind of sketchy now on what foods do and do not contain glueten specifically.
I would suggest contacting Hospitality Services to see what exactly is available for you. I'm not sure how you want to contact them, so I'm just going to give you the link. It has various people to contact, and a few different ways.
http://hospitality.mcmaster. ca/contact/contact.html
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McMaster Combined Honours Cultural Studies & Critical Theory and Anthropology: 2008
McMaster Honours English with a minor in Indigenous Studies: 2010
Carleton University Masters of Arts in Canadian Studies: 2012 (expected)
We are people of this generation, bred in at least modest comfort, housed in universities, looking uncomfortably into the world we inherit. -- Port Huron Statement