QUESTION
What is GCM anyway?
At the slight risk of being a bit too blunt, it could probably be described as a Churchianity-based website dedicated to ear-tickling, where issues about what Scripture "REALLY says" are more likely to be decided by a vote than actual reference to what is Written. (No, I am honestly not joking. )
There are pointers higher up in the thread here to the site. More seriously, while there are without question serious students who probably read the debates there, I find that the majority of what I see reminds me of why I so long ago left the "mainstream church", and find the Acts 17:11 reference to the Bereans so refreshing.
One last observation: there are a number of juvenile "quirks" and gimmicks which seem to affect the mindset of posters there ("manna", pretentious "titles", and rankings, for example). They seem to serve as great examples of what NOT to do on a site dedicated to serious study of Scripture!