In small saucepan combine, cranberry sauce, ketchup, vinegar, mustard, brown sugar and garlic powder. Bring to boil over medium heat, reduce heat and simmer for 5 min, stirring occasionally. Heat grill to medium, indirect heating. Grill chicken 20 min, brushing w/ sauce. Turn chicken over, grill 20 min, or until no longer pink inside, brushing w/ sauce.