Yes, if it`s exactly the same G-speed it should work. By the way, if it works, you know that it is not the drives, but some other piece of G-tech hardware. My guess is: it`s the controller. If it is the controller you can throw it away, or you persuade G-tech to get a replacement.
cheers
Rainer
factstory
Rainer Wirth
phone_0049-177-2156086
Mac pro 8core
Adobe,FCP,Avid
several raid systems