1. Fruit is a non ideal source of carbs. Do some research on this and fructose. Your muscles need glycogen - fructose needs to be processed by your liver before glycogen can be produced unlike the energy from potatoes, sweet potatoes and other veg. There are indications/opinions that fructose in and of itself is not a healthy thing for human consumption by some in the paleo/primal community do some googling.
2. Gatorade -- why not water? Gatorade will hydrate you but also is basically humming bird food. If your goals are increased performance instead of weight loss or improved body composition it will help to that end; typically people are doing HIIT to lean out -- Gatorade will not help this. humans evolved kicking ass while drinking water - trust me it'll be good for you.
3. What kind of HIIT are we talking about? You are not at risk for hyponutremia (sodium and electrolyte deficiency) from doing HIIT every day. If you are hiking the Bright Angel Trail of the Grand Canyon in 110 degree heat in direct sunlight each day you are - otherwise you definitely do not need to be chugging Gatorade to avoid dying from sodium deficiency.