Hello,
The Group Update Provider was a feature request to support designating a particular client to serve as a computer that will get content updates and publish them. This is designed to provide functionality vaguely similar to configuring a legacy Symantec AntiVirus client as a secondary server.
A Group Update Provider is a client computer that receives updates from a management server. It then forwards the updates to the other client computers in the group. A Group Update Provider can update multiple groups.
The computer that is downloading and publishing the content is referred to as the “Group Update Provider.” The computers in the client group will use the designated “Group Update Provider” as a local proxy for content updates.
Note: Group Update Providers distribute all types of LiveUpdate content except client software updates. Group Update Providers also cannot be used to update policies.
Setting up a Group Update Provider is easier than setting up an internal LiveUpdate server. Group Update Providers are less resource-intensive and so reduce the load on the management servers.
This method is particularly useful for groups at remote locations with minimal bandwidth.
See Configuring Group Update Providers to distribute content .
Reference:
http://www.symantec.com/docs/TECH102541
http://www.symantec.com/docs/HOWTO55172
http://www.symantec.com/docs/TECH96419
Hope that helps!!