Usually when you need a report for a given Group Policy object, you would launch the Group Policy Management Console, select the GPO and then select the settings tab that produces the report.
But what if you need a report for multiple or even all your GPOs you have within your Active Directory ? Going through each GPO and produce the report manually is going to take ages and is boring.
My colleague Rudi recently found a script that automatically creates GPO reports it finds within your AD. You can select them individually or simply report on all.
The script is stored on the Win32 Scripting site which is a usefull resource for admin scripts since many years. The GPO reporting script can be found here