Heat gas or charcoal grill for indirect cooking as directed by manufacturer.
In small bowl, mix 1/4 cup of the ketchup and the honey; set aside. In large bowl, mix remaining 1/4 cup ketchup, the Worcestershire sauce, garlic salt, pepper and egg. Stir in onion and bread crumbs. Stir in beef until well mixed.
Shape beef mixture into 6 patties, 3/4 inch thick and about 3 1/2 inches in diameter. Wrap 1 slice bacon around each patty; secure with toothpick.
Carefully spray grill rack with cooking spray. Place patties on unheated side of two-burner gas grill or over drip pan on charcoal grill (medium heat). (If using one-burner gas grill, cook over low heat.) Cover grill; cook 20 to 25 minutes or until slightly pink in center. Using spatula, turn patties over. Brush with ketchup mixture. Cover grill; cook 5 to 8 minutes longer or until meat thermometer inserted in center of patties reads 160°F and bacon is crisp. Serve on bread.