Prep the chicken: Pat chicken halves dry with paper towels. Brush lightly with olive oil.
Season: In a small bowl, mix salt, pepper, garlic powder, onion powder, paprika, and cayenne (if using). Rub seasoning all over the chicken, including under the skin if possible.
Preheat your grill:Gas grill: Preheat to medium-high heat (around 375–400°F). Set up for indirect heat by turning off one burner.Charcoal grill: Light coals and arrange them on one side of the grill for indirect cooking.Pellet grill or smoker: Preheat to 375°F.
Grill the chicken:Place chicken halves skin-side up on the cooler side of the grill (indirect heat).Cover the grill and cook for 40–50 minutes, turning once halfway through. Internal temperature should reach 165°F in the breast and 175°F in the thigh.
Rest & serve: Let the chicken rest for 5–10 minutes before slicing. Serve with your favorite sides!