My understanding is that it depends on context. Have you been sweating a lot? Are you super dehydrated? Sports drinks (actual “sports drinks” like Gatorade) are probably better for you than water.
The reason for that is because you lose a lot of salt and other electrolytes through sweat, and drinks like Gatorade are meant to replace those. That’s why professional athletes, especially stamina-based athletes like marathon runners, football players, etc, tend to drink some form of sports drink (the sponsorships help though). Additionally, if you’re extremely dehydrated then you may also be low on electrolytes (because you’ve been out in the sun, or you’ve been sweating a lot). I’ve also heard that sports drinks hydrate faster because they’re supposedly similar to saline, but I can’t find any sources for that, so take that with a grain of salt.
However, if you’re just kinda thirsty or want something to drink, then water is probably better. I doubt you’ll hurt yourself drinking Gatorade instead of water, but you don’t need it either.