Slice eggs in half lengthwise.
Scoop out the yolks and place in a medium bowl.
Add avocado to bowl, and using a fork, mash with yolks until fairly smooth.
Add mayonnaise, lime juice, garlic powder, cayenne and salt. Stir well to blend.
Place the filling in the whites of the eggs using a small spoon, or pipe in with a pastry bag. Garnish as desired.
Serve immediately or refrigerate in a lightly covered container.