Very often you spend a lot of time searching for the right Group policy setting. You can use the filter function in GPMC or you can download the excel sheet from Microsoft:
But this often ends up with you not finding the setting right away. And it also takes a lot of time downloading the Excel sheet and searching it. You end up trying Google and at last you find something.
But Instead of using Google I suggest to take a look at this url.
It is an online search application for Group policy settings created in Windows Azure. They have also included the option to add it as a search provide for Internet explorer. This is really a great tool for finding Group policy settings.
From now on this will be my first place to search.