Gatorade and Powerade are not energy drinks.

They have sugar in them, but there is not so much sugar that Gatorade causes you to crash.

Their primary purpose, and the point of their marketing, is that they replenish depleted electrolytes. When given the choice between water and Gatorade while working hard (exercising, yard work, etc), you will last longer on Gatorade because it contains a little bit of sugar and a lot of electrolytes.