Combine the wine, oil, garlic, rosemary, pepper, orange zest and a pinch of salt in a shallow dish. Add the chicken, turning to coat. Cover and marinate in the refrigerator for at least 3 hours, turning the chicken several times.
Preheat the griller. Reserving the marinade, grill the chicken, bone-side-up, 15 cm from the heat for 8 minutes. Turn the chicken over, brush with the marinade, and grill for 7 minutes or until cooked through.