I understand its overwhelming, we were all overwhelmed by one thing or another when we first got gliders too.
I've worked with many people who are either rehoming gliders or taking in rehomed gliders in the last few years. Personally I have several that were rehomed or surrendered to me for various reasons. Most often its due to time or money or vet care.
Sometimes people (much like you ) THINK they need to rehome the gliders because of someone else's opinion, when in reality they really don't want to rehome them at all. Most people would be happy to just let them rehome them simply because you are contemplating it. I'm not one of those people.
If the gliders are healthy, happy and thriving with you and your family...... and your family loves them and are doing your best to care and provide for them KEEP THEM.
I would muchhhhh rather see you keep those babies and add a family cat than rehome them.
Why? there are so many gliders being bounced around from owner to owner to owner to owner. Some never find their forever home, never find that one person who takes the time to work through what ever issue the gliders have. It can be a very sad cycle. Even when you believe you rehomed to someone that will take great care of them, it might not be permanent.
Just yesterday, my friend that also works with rescues and surrenders got two gliders back that she adopted out over a year ago to a vet tech. The vet tech ignored the contract and rehomed them to someone else who didn't know how to care for them properly. Who then also tried to rehome them again. My friend got them back from the 2nd home before they had a chance to rehome them. Both gliders were severely dehydrated and one may not pull through.
Now this isn't meant to scare you by any means, this is meant to show you that even rehoming to a vet tech who should be responsible enough to comply with the contract ( which is legally binding and enforceable ) and return them to my friend, or in the very least find them a suitable home... didn't end happily.
I know the lengths my friend goes to before adopting out gliders, she could not have known this would be the outcome of that adoption.
It happens, and it happens a lot more than the average glider owner sees despite the amount of time and energy we put in to try and prevent it.
I'm sharing this with you so you understand why I feel the way I do. If a family cat is the only reason you are debating on rehoming them, because a couple of vets and a few other people "think you should"
For me, that's not enough and I'd rather tell you it's ok to have other pets ( which it absolutely is ) Personally I say keep em and get your cat and make sure you make the living space a safe as you can.
Now if you still decide to rehome them, that is entirely up to you! But please only rehome them for your OWN reason, not anyone else's. Those other people aren't the ones that have to say goodbye to a part of the family. Those other people aren't going to wonder how they are doing in their new home, if they are cared for, if they are healthy, if they got rehomed again... Those other people shouldn't be making decisions for you and your family pets. Those decisions are for you to make based on your own reasons and abilities.