1. Scoop avocado into a bowl. Mash with fork. Stir in Greek yogurt.
2. Fold in chicken, salt, pepper, garlic powder and curry powder.
3. When combined, add celery, onion, grapes and lime juice. Stop to combine.
4. Spread mixture onto tortillas. (Makes about 4 smaller wraps or about 2 larger burrito size wraps)
5. Spread a few slices avocado on top and roll up. Slice in half and serve. Leftovers store well in the refrigerator in air-tight container.