Hopefully these are all young gliders and the boys are not yet mature. They may have paired off for now, but it is just as likely that they will all sleep in the same pouch frequently.
If they are all under 4 months old, there is no need to separate them but you do need to get the boys neutered quickly if you want to keep them all together. They can live happily together, but the boys need to be neutered BEFORE they do fight over the girls.
If you are planning on allowing them to breed - you have a great deal of homework (READING, READING and More READING) to do. You will also definitely need a second cage so you can separate the pairs. We encourage new owners to have at least a year's experience caring for their gliders before jumping into breeding. This is especially important if you were not given a full lineage (family tree back at least 3 generations) for each of these gliders so you can verify that they are do not have any common ancestors. Even if you got the two sets of gliders from different breeders, it is still possible that they are genetically related and that brings a whole new set of problems to breeding and can result in loss of any joeys they do conceive.
In any event, All 4 gliders need to be seen for a well check up. This is especially important since you did not quarantine the boys when you brought them into your home before introducing them to the girls. If one of the gliders has any parasites, then you will be giving medications to all 4 of them since they are already sharing the cage.
For other new owners reading this thread - there are many of us here to answer your questions and help you be the best glider parents for your new little friends. Please ASK FIRST if you are not sure about things like quarantine, introductions, feeding, housing, and bonding with your gliders.
Read the information in the Gliderpedia for great tips with no waiting for replies to many of your questions.