Preheat oven to 400°F (200°C).
Season chicken breasts with garlic powder, salt, and pepper.
Bake chicken for 25 minutes or until cooked through.
In a bowl, mix Parmesan, ranch dressing, mayonnaise, and Provolone cheese.
Spread the cheese mixture evenly over the cooked chicken.
Broil for 3-5 minutes until cheese topping is golden and bubbly.
Serve immediately.