Partially cook bacon in a large skillet. Wrap each scallop with 1 half slice bacon. Set aside.
Bring syrup to a boil in a medium saucepan over medium-high heat. Cook, uncovered, until reduced to 2/3 cup (about 5 minutes). Remove from heat; stir in butter and next 3 ingredients.
Thread bacon-wrapped scallops on 12 (10- to 12-inch) skewers; brush syrup mixture over kebabs. Coat food rack with cooking spray; place on grill over medium-high heat (350° to 400°). Place kebabs on rack; grill, covered with lid, 3 to 4 minutes on each side or until done, basting often.