A GPO is a "Group Policy Object".
Group Policies are used by Administrators to centrally manage Users and Computers. Basically they make a change on a server and it applies to all workstations, instead of them going to them one by one.
Active Directory is located in the "Administrative Tools" add-on. This package normally comes within a Windows Server 2003 install CD and it might even be included in the XP Cd.. I forget, so don't quote me on it.
Regardless. In order to create/change/delete policies on a Domain Controller (the servers that manage computer/user accounts etc.), you need Admin right's on that server. It's also a safe bet to assume that even your local IT (end user support) or whatever you may call them don't have full admin rights to those servers since one pissed employee messing with the server could technically bring the network down. So unless you buy your Network Administrator a vacation to Aruba and a case of Jack Daniels, you're pretty much out of luck on this one. Although if they are nice people, they might change this setting for you if you have good reason for it.
Use caution though saying "it's annoying" to the admin may or may not cause them to get irritated
Sorry for the walls of txt. What I'm trying to get across is simply, no you will not be able to change this yourself. Just that writing alot of stuff (even if its nonsense) helps the day go by when you're reading through 100 pages of logs