While searching for criteria about the GPOs is helpful, searching for criteria inside of GPOs is even better. There is an ability to hone in on particular settings within a GPO. This is really more akin to filtering than it is to searching, but is still useful. This is probably the most powerful search function inside Group Policy, because GPO settings is a vast wilderness that contains thousands and thousands of possibilities. Rather than resorting to an online search engine, let's find out what results can be obtained by using the built-in filtering capabilities.
It is important to note that filtering settings within a GPO only works for Administrative Templates. It's a bummer that this same capability is not ported over ...
