Heat grill. In medium bowl, combine all salsa ingredients; mix well.
When ready to grill, sprinkle both sides of each steak with garlic salt. Place steaks on gas grill over medium heat or on charcoal grill 4 to 6 inches from medium-high coals. Cook 8 to 12 minutes or until of desired doneness, turning once or twice. Serve steaks with salsa.