Are the lights on in the room when you get him out to play?
Most gliders will not come out to play until the lights are turned off. He is probably very active after you go to sleep at night.
Gliders also need light during normal daylight hours to cue their nocturnal internal clock.
If the room is dark during the day while you are out, he may be very active during the day and then go to sleep in the evenings when you turn the lights on.
Make sure the room where the cage is located is well lit during the daytime. Turn the lights off at sunset and leave only a night light or two on in the room at night to see if your glider will get back on his expected nocturnal schedule.
Put his food in the cage shortly before you expect him to wake up and give him a little time to eat some before you take him out for playtime. Some gliders need some food for energy before they are active for the evening.