1. Preheat oven to 400°.
2. Place pizza crust on a baking sheet coated with cooking spray. Brush 1 teaspoon extra-virgin olive oil evenly over crust. Top evenly with 1/4 cup shredded mozzarella cheese, chicken, Gorgonzola cheese, and peach slices. Top with remaining 1/4 cup mozzarella. Bake at 400° for 11 minutes or until crust browns.
3. Place vinegar in a small saucepan over medium-high heat; cook until reduced to 2 tablespoons (about 5 minutes). Drizzle balsamic reduction evenly over pizza. Cut pizza into 8 wedges.