Navigating Group Policy Physical Structure
Physically, GPOs are represented through a series of template files that are stored on disk. These templates files contain information about the many thousands of policy settings and the state of these policy settings. Each GPO has a master template folder associated with it. This template folder is physically stored in the %SystemRoot%\SYSVOL folder on domain controllers and is referred to as a Group Policy template (GPT).
Keep in mind that you never need to interact with GPCs and GPTs directly. In fact, it is easy to create problems with a GPO if you attempt to make changes directly to the GPC or ...