Preheat the grill to medium-high heat.

In a bowl, mix salt, black pepper, garlic powder, and paprika.

Rub the seasoning mixture all over the chicken thighs.

Place the chicken on the grill, skin side down, and cook for 10-12 minutes.

Flip the chicken, brush with barbecue sauce, and continue grilling for another 10-12 minutes.

Check the internal temperature; it should reach 165°F (75°C).

Remove from the grill and let rest for 5 minutes before serving.