GSM shield A6 library compatibility...

hiiii....
I m new and not too much experienced with arduino and it's shields
i have to buy a GSM shield for my project..
I m confused
if i can use GSM library with GSM shield A6..

Plz help me to choose...

Don't cross-post http://forum.arduino.cc/index.php?topic=483108.msg3297343#msg3297343