Preheat oven to 375°F. Mix Gravy Mix, poultry seasoning, milk, water and butter in large skillet or saucepan. Bring to boil on medium heat, stirring frequently. Stir in chicken and vegetables. Return to boil. Reduce heat to low; simmer 5 minutes.
Spoon into 2-quart baking dish. Top with biscuits.
Bake 15 minutes or until biscuits are golden brown.