Is it unhealthy to drink gatorade everyday?

No because it's not really sweet plus it keeps you hydrated

Yes, and no Gatorade was made to replenish the combination of water, carbohydrates, and electrolytes that the school's student-athletes lost in sweat during rigorous sport activities. But if you are drinking it as a common drink like you would tea or soda, then no it wasn't made to just be drank. Unless you are doing things and losing sweat.