In a medium saucepan bring water to boiling. Slowly add grits, stirring constantly. Return to boiling; reduce heat. Cook and stir for 5 to 7 minutes or until the water is absorbed and mixture is thickened.
Stir in the cooked turkey sausage, green onion, jalapeno pepper, garlic salt, and black pepper. Spoon into serving dishes. Sprinkle each serving with cheese.