Bonds are something that you have to build, not something that just magically comes along.
A GLO is great because their members make it great. Every member influences each other, and such influences have great effects on the direction of the organization. If you can influence everybody else to do the little things to make the organization great, then it will be great.
The bonding and greatness are not things to be taken for granted. Otherwise, you might as well be some random club with t-shirts all living in the same place and having some ultra-confidential information.
You've stayed long enough to get initiated, and it appears that you have nothing to lose by staying and nothing to gain by dropping out. After all, based on your description, it appears that it's not just you who's feeling left out. So, by the gist of things, all that's really required is a bit of fixing.
Not everyone immediately clicks with everyone else. I mean, personally speaking, I've gotten lucky a few times and immediately clicked with a few friends, but for the vast majority (80%+), the conversation always started awkwardly while one or both sides worked to get more comfortable with each other. There are several resources out there on how to deal with awkward situations, but avoiding or ignoring them is the worst possible way to deal with them.
In fact, being from a fraternity that only recruits from STEM majors, I can honestly say that even though we have a really strong brotherhood (and show it), almost nobody started this way. Almost everybody (including me) actually joined for the other stuff (eg. connections for being in a national, academics) and then found out about the brotherhood later. And yes, we really had to work at making it happen.