1. Combine chili powder, cumin and garlic powder in small bowl; sprinkle both sides of pork chops.
2. Heat charcoal or gas grill to medium-high; coat grates with nonstick cooking spray. Grill chops 5 minutes on each side until internal temperature reaches 150°F.
3. Meanwhile, combine remaining ingredients in medium bowl. Spoon equal amounts of the avocado mixture (about 1/2 cup) on each of 4 dinner plates; top each with 1 chop. Reserve remaining 4 pork chops for Southwestern Pork & Potato Soup recipe.