Depending on how much gatorade you drink you could very easily be drinking just as many calories as you are burning by your commute. I don't do gatorade unless it is very hot AND the ride is more than 2 hours. And even then, I only drink G2 which is low calorie. You only need to replenish 100 calories an hour for 2 hour and longer rides. Your commute is not long enough to need anything other than water even in extreme heat.