Set uppermost oven rack 5 inches from heat source, and preheat broiler.
Melt butter in a large skillet over medium-high heat. Stir in onions, and cook until soft and golden. Remove from heat. In a bowl, stir together 1/2 teaspoon paprika, sauerkraut, onions, and sour cream.
Season pork chops with pepper, garlic salt, and 1 teaspoon paprika.
Broil pork chops 6 minutes. Turn, and broil 5 to 6 minutes more. Remove from oven. Spread sauerkraut and onion mixture over pork chops, and broil 1 or 2 minutes more.