Preheat gas grill to high or grill pan. If cooking on the grill grates make sure to oil.
Place sliced sweet potatoes into bowl and combine with olive oil, pepper, garlic salt and smoked paprika. Toss to combine.
Lower heat to medium. Place potatoes on the grill and cook for about 10 minutes on each side or until soft when pierced. You can also place them on a grill pan if you don't want to cook them right on the grill grates.
Transfer potatoes to bowl and season with more salt if desired. Serve warm.
I did not peel my sweet potatoes but if you prefer them peeled that works too!