Thaw salmon, if frozen. Rinse the fish and pat dry. Place in a plastic bag set in a shallow baking dish.
In a small bowl, stir together the bourbon, brown sugar, honey, soy sauce, ginger, and pepper. Pour over fish in the bag. Close bag. Marinate fish in refrigerator 1 hour, turning occasionally to distribute marinade.
Drain fish, reserving marinade. Grill fish on the lightly oiled rack of a covered charcoal or gas grill directly over medium heat. Grill 8 to 12 minutes or until the fish begins to flake easily with a fork, turning and brushing with reserved marinade once halfway through the grilling time. Discard the remaining marinade.