Try to get it to eat from your hand but do NOT GRAB IT!! I promise you it will get away and then it won't come near you ever again. Get some fresh fruits and cut them up into small little pieces. Dry glider food is actually not good for it, even the stuff made for gliders but it is better than bird seed. It will love you forever though if you fed it fruits. But you need to convince it to come close enough to eat from your hand. Then, once it's more comfortable with you, it should jump on you. Still do not make the mistake of trying to grab it. You will lose. If you can convince it to jump on you, then you could just walk back into your home with it hitching a ride on you. This was someone's pet. That pattern of behavior will click back into place once it feels like it can trust you. This might mean several days of touch and go but you have to be patient and spend as much time around the glider as possible. You may even make contact with it several times before it will trust you enough to stay on you while you walk back into your house. Wear a coat or fleece jacket halfway zipped up so it might be tempted to dive down into it.
Also, if you know where the tree is that it's been sleeping in, try hanging another pouch on it.
Another thing... If there is a door into your house close to where the glider is eating, try leaving it open. Gliders are notoriously curious. You might be able to trap him in your house. But this would require you waiting near an open door for a few hours. Lighting would also have to be very dim.