50 calories per pack. 1/2 the sugar (Original Gatorade has 32g sugar per pack, G2 has 12g sugar per pack) of original Gatorade. Lower sugar. Electrolytes: Hydration with 250 mg sodium and 80 mg potassium to help replace what you sweat out. gatorade.com. Comments? 1-800-884-2867 or visit gatorade.com.