Quinoa is one of a variety of gluten-free whole grains and pseudo-cereals (plants that produce seeds that are used in much the same way as whole grain seeds are), but it’s not the only one. The following is a list of popular, gluten-free whole grains and pseudo-cereals that you are likely to find in your local store or available online:
Amaranth
Buckwheat
Corn
Millet
Oats (when not produced alongside gluten-containing products)
Quinoa
Unmilled rice and wild rice (not white rice)
Sorghum
Teff