No, suji is not gluten-free.
Suji, also known as semolina, is a wheat product and therefore contains gluten. According to the provided reference, "Gluten is found in wheat, suji, maida, rye and barley." If you are looking for gluten-free alternatives, the reference suggests using millets, which are gluten-free and can be used to make upma, idlis, and cheelas.
Therefore, individuals with gluten sensitivities or celiac disease should avoid suji and opt for gluten-free alternatives like millet.