Preheat oven to 420 and line a large pan (pizza pan if you have one) with foil and grease with cooking spray. Roll pizza dough
Sprinkle chicken with garlic powder, salt, and pepper. Cook in a greased pan or skillet over medium-high heat 3-4 minutes on each side until cooked through. Cut into small strips or pieces and set aside.
Spread ranch dressing over pizza crust. Sprinkle generously with cheese. Top with chicken and crumbled bacon. Bake for 15-25 minutes until cheese is bubbly and crust is golden brown. Sprinkle with parsley and serve warm.