Preheat oven to 400°F. Line a large baking pan with parchment paper or grease with cooking spray.
Place chicken legs on pan and drizzle with olive oil. Set aside.
In a small bowl, whisk garlic powder, onion powder, chili powder, paprika, salt, and pepper until combined.
Rub seasoning over chicken until each piece is thoroughly coated.
Bake for 15 minutes, then remove chicken from oven and brush half of bbq sauce over chicken.