Gatorade is nothing more than flavored sugar water with added sodium. Look at this nutrition label. The serving size is for 1/4 of a bottle and we all know that the person will end up drinking it all in one sitting.
If you drink the entire bottle of Gatorade, you will have taken in 200 useless calories, 440 mg of sodium, a huge 56 mg of carbs from 56 mgs of sugar.