JamesBrawn has already been clear on it and I don't know if another person chiming in can make a difference for you, but...
Gatorade is not a quality product.
Large amounts of Gatorade are not a good idea.
The sugar content is 50% fructose which cannot be used by muscles and is in no way equivalent metabolically or for health to glucose, glucose polymers (inclusive of cyclic dextrin, maltodextrin, etc) or starches.
You're drinking the wrong sugar, in huge quantities.
The advice given would be a big improvement.
If you must use a sugar instead of cyclic dextrin or a maltodextrin, then use glucose (dextrose.)
There is nothing magic about the electrolyte formula of Gatorade. If you're interested I can give you a better one. Or as JWF mentions, Surge Workout Fuel would be better yet and is not a costly product.
It's hard to believe there's anything special about Gatorade's flavor.
So the type of sugar is crappy, nothing special about the electrolytes, nothing cheaper about the price, so why the fixation?