Preheat your grill to 350°F/180°C.
In a small bowl, combine all of the seasonings (cumin, smoked paprika, oregano, garlic powder, and salt).
Spatchcock the chicken by cutting out the backbone using kitchen shears, and laying the chicken flat.
Drizzle both sides with olive oil, and season with the seasoning that you prepared.
Oil the grill to prevent the chicken from sticking.
Place the chicken on the grill breast side down on direct heat, and grill for 6-8 minutes.
Flip the chicken (if you flip it too soon, it might be stuck to the grill and this can tear the skin), and cook for 30-40 more minutes or until the internal temperature of the thickest part of the breast is at least 165°F/74°C.
Pull off the grill, allow the chicken to rest for 10 minutes then carve and serve.