PREHEAT grill to medium-high heat. Remove rind from ham, if necessary. Score ham by making shallow cuts across the surface. Place on roasting rack in large disposable aluminum foil pan. Insert ovenproof meat thermometer into thickest part of ham.
PLACE pan on one side of grill; turn off heat source directly under pan. Grill, covered, 2 hours or until thermometer registers 140°F, brushing ham with your favorite glaze for the last 30 min. of the grilling time, if desired.
REMOVE ham from grill; let stand 10 to 15 min. before carving.