Management of Mac and Windows Environment

How do you all manage Macs with a Windows domain?

For example:

Provide privacy and security notices consistent with applicable Federal Contract Information rules.

I do not think there is a way to do this with a Mac besides adding the file to /Library/Security/. Is it possible to have a Apple device read from GPO?

It is actually not a very easy task to accomplish. I can’t think of any other way apart from the one you mention.