Preheat the smoker to 250°F. Place the turkey legs on a sheet tray, gently loosen the skin from the meat by running your fingers under the skin, set aside.
In a small bowl mix together the garlic powder, onion powder, salt, pepper, brown sugar, and chile powder. Rub the turkey legs all over with the mixture, getting under the skin. Place the skin back to its original shape.
Once the smoker is to temp, about 15 minutes, place the turkey legs directly on the grates. Smoke for 2 to 2 ½ hours, until the internal temperature reaches at least 165°F. I like to smoke them until the internal temperature reaches 180°F as I tend to find the meat more tender. Let cool slightly and serve!