Gliders need to be on a good diet. I feed mine the HPW diet. It has some items that need to be ordered online, but otherwise it is just normal fruits and veggies that you can buy at any store. My gliders love melon, any kind, and pineapple, papaya, avocado, apples, grapes, oranges, peaches, cucumbers. I get the frozen mixed vegetables (without lima beans) and they love that too. My gliders don't care for any berries or bananas.
Heres a little something to think about as far as your fruits are concerned. You may want to keep the citrus fruits to a minimum. Citrus can cause diarrhea and should be used in moderation. But other than that I really havent heard of any fruits that you should feed.