I've had GSS 1.1 running on a few 2003 Server machines for a couple of weeks now. The only issues I've come up with are as follows:
Multiple NICs: Ghost seems to have a problem choosing the right NIC if each client has multiple NICs installed.
Multiple User Accounts: My client machines have multiple user accounts on them, and the Ghost console displays them as separate machines. Sometimes it will display the same computer/username twice or even three times, and I can't figure out why it is doing this (I've posted about this under a separate thread).
Other than that, GSS has worked great for creating/deploying images.