According to the Health Canada website - Gluten: any gluten protein or modified protein, including any protein fraction derived from the grains of the following cereals: barley, oats, rye, triticale, wheat, kamut or spelt. The definition would also apply to the grains of hybridized strains of the cereals listed above.
There are also those who don't have your best interest at heart and are just trying to make a quick buck. Unless you are 100% sure something is safe, don't risk it. In the end, your health is top priority.