Prepare Brine (Optional): In a pot, boil water. Add kosher salt and sugar. Stir until dissolved. Remove from heat and let it cool slightly.
Stir in 4 cups of ice until mostly melted and brine is room temperature.
Place pork chops in a bowl/container. Pour brine over chops, ensuring they're fully submerged.
Cover and refrigerate for at least 4 hours, or overnight for best results. Before cooking, remove chops from brine, rinse, and pat dry.
Grilling Instructions: Mix salt, garlic powder, and black pepper in a small bowl for pork rub.
Coat pork chops with dry rub, covering all sides.
Heat gas or charcoal grill to 350°F (medium to medium-high heat).
Cook chops for 8-10 minutes per side, or until until seared and internal temperature reaches 145°F. Use an instant-read thermometer for accuracy.
Grilled Peaches (Optional): Mix melted butter and brown sugar. Brush over peach halves. Grill cut side down for 4 minutes per side until soft with grill marks.
Remove from grill and serve pork chops with grilled peaches on top. Note: Pork chops may have a slight pink center, which is normal.