In a large mixing bowl, mash the peeled and pitted avocados with a fork or potato masher until reaching a smooth consistency with minimal chunks.
Whisk the lime juice, garlic powder, salt, and black pepper into the avocado mash until fully incorporated.
Add the shredded chicken, diced red onion, and minced cilantro to the bowl.
Fold the ingredients together using a rubber spatula until the chicken is uniformly coated with the avocado mixture.
Verify seasoning levels and serve immediately to ensure optimal color and freshness.