Dear All,
What is the Feature and Functionality
This should help you out;
https://www-secure.symantec.com/connect/blogs/sep-11-gup-information-and-videos
GUP provides the content and software(SEP) updates to the client ,
check this link if this is helpful
http://www.symantec.com/business/support/index?page=content&id=TECH102541&locale=en_US