To be honest... unless you're playing top-level hockey, or your team is ridiculously short benched, two games of hockey with a 2 - 3 hour break between won't put that much of a strain on the body of someone with a moderate level of fitness (that is, exercising at least 2 - 3 times a week). With that said...
If you're eating a meal, you don't need Gatorade or any other sports drink. Water is fine; you'll likely get sufficient electrolytes from your food. It can't hurt to have a bottle of Gatorade, but really, the Gatorade will just be empty calories.
I always keep a stash of
Clif bars in my hockey and gym bag for a quick meal before exercise, just in case a wrench is thrown into my plans and I miss a meal or something. They have a good combination of fibre, protein, and electrolytes. (Check the sodium, potassium, and magnesium content of a Clif bar -- there's more electrolytes in 1 bar than in a bottle of Gatorade.) However, if you have 2 - 3 hours between games, you can probably have a regular meal and be OK. Go out and grab a sandwich, or better yet, grab a cold sub from Subway beforehand so it's on hand.
But in the end, you know your body best. You know your fitness level, and how much stress your body can take. You know what your stomach is like, and if a meal 90 minutes before a game will upset it or not. Maybe you have certain fitness goals (e.g. fat loss, muscle growth) and want to modify your diet to take these into account. Take all these replies in stride, but choose what you feel is best for *your* body.