What kind of information are you looking for?
If you are entirely new to GMAT i suggest you go through this thread http://gmatclub.com/forum/new-to-the-gmat-club-start-here-130870.html
It has got a detailed overview of GMAT including all the technicalities , exam pattern , exam dates , B-School applications etc.
This thread is designed for all the newcomers in Gmatclub.com and extremely helpful.
Give Kudos if this post helps you
If you have any confusion or query please let us know.