A. GSNW is available only for NT servers. It includes the CSNW service to provide basic file and printer connectivity. In addition, GSNW allows an NT Server to act as a non-dedicated gateway. This means that your NT Server can connect to a Netware box and share the Netware drives as NT shares for all of your Microsoft network clients to access seamlessly (including those coming in via RAS).
While it works well, it's likely that it would be a bottleneck if you were going to link large networks using this single gateway!
The Netware server will need a special GROUP created called NTGATEWAY and a user account on Netware must be assigned to this group and to the gateway service on the NT Server.