HI Casper,
I read your site scenario which you described here. as you mentioned you wanted to updgarade clients with new revision. And secondly you mentioned that can you apply it through GUP?
Here I would like to mention that through GUP only you can update only definitions at your remote site clients systems which can be number of from 10 to 1000 and so on. At your site any one client will act as GUP , it will receive updates from SEPM and later distribute to your site systems to update. Means remote site system will not get definition update from SEPM and no bandwith issue , they will only talk to SEPM for policies etc according the heartbeat interval you specified on SEPM for clients.
Secondly you mention that you wanted to upgrade your cleitns with one SEPM. Here upggrade means to upgrade SEP revision, you can do that throuth SEPM console as described by Hidayet Altun, Vote up for his suggestion. But you did not mention about revision upgradation etc. or you only wanted to remote site systems only defenition update? please clear.
for this you have two option for good bandwidht site you can update through SEPM console as suggested by Hidayet Altun, second method for low bandwidth site that you you push deployment wizard, you copy the newly created package from SEPM for the destined group at your remote site any system or server and also copy the remote push wizard exe. through this method the upgrade task will done at local site and no bandwidh issue occur, client wil update with new revision automatically locally , only you will have to enter the super user credential through remote push deployemt wizard in case of Domain site or for workgroup site you should have single administrator password for all the clients.
you can go through the following links for details. I think you will get answer accroding the scenrio of your sites.
http://www.symantec.com/docs/HOWTO55088
http://www.symantec.com/docs/HOWTO26781
http://www.symantec.com/docs/HOWTO55065
http://www.symantec.com/docs/HOWTO55066
http://www.symantec.com/docs/HOWTO55064
http://www.symantec.com/docs/HOWTO55086
Regards,
Ajay Singh