I don't know where this is coming from. In the US, there is a standard being phased in regarding gluten-free labels. But Canada has had one for years. It was updated effective August 4, 2012.
I found out from one of my boyfriend's friends that if i eat any processed foods, to make sure its Certified Gluten Free. And, its also best to eat Gluten Free foods from the States, because Canadian standards for gluten free aren't as good.
Here is the applicable Canadian regulation. It applies to all food sold in Canada, regardless of where it comes from.
Food and Drug Regulation B.24.018
It is prohibited to label, package, sell or advertise a food in a manner likely to create an impression that it is a gluten-free food if the food contains any gluten protein or modified gluten protein, including any gluten protein fraction, referred to in the definition "gluten" in subsection B.01.010.1(1).
Subsection B.01.010.1(1) reads:
(a) any gluten protein from the grain of any of the following cereals or the grain of a hybridized strain created from at least one of the following cereals:
(iv) triticale, or
(v) wheat, kamut or spelt; or
(b) any modified gluten protein, including any gluten protein fraction, that is derived from the grain of any of the cereals referred to in subparagraphs (a)(i) to (v) or the grain of a hybridized strain referred to in paragraph (a). (gluten)
In Canada, the gluten grains are "priority allergens" and must be clearly disclosed on the label of a food containng them.