I found several sites that mention durian being ok for gliders to eat (it doesn't appear to be toxic, at least.)
I also did a nutritional data search for durian and here's the page:
http://nutritiondata.self.com/facts/fruits-and-fruit-juices/2088/2
Based on the quantities of a 1 cup serving, the phosphorus (94.8 mg or 9%) is at a much higher ratio than the calcium (14.6 mg or 1%). This isn't a good choice of food, but in
moderation it seems like it would be fine. Of course that also depends on what feeding plan you are on.