In a large saucepan, combine the shredded chicken, beans, chopped onions, corn, salsa, garlic powder, ground cumin with some salt and pepper, to taste. Warm through over medium heat for 8-10 minutes.
Cook the brown rice as directed on the package.
Place the tortillas on a clean surface and spoon the rice and chicken mixture over the top. Sprinkle with a handful of cheese if you desire (it should melt from the warmth of the chicken...if not, microwave). Roll and fold up the burrito.
For gluten-free version, serve the mixture with corn tortilla chips.
Serve Chicken Burritos as is, or with a small side salad. Or avocado slices.