You can use the GP Repository to plan and evaluate your GPOs before implementing them in your production environment. Using the GP Repository enables you to perform a number of tasks that assist you in managing Group Policy in your Active Directory environment:
Implement a process for creating, testing, and deploying GPOs to minimize risks for your production environment
Track the history of changes made to GPOs and restore prior versions
Avoid changing GPOs directly in your production environment
Take advantage of features such as version control and reporting
Delegate GPO administration capabilities and control the tasks each Group Policy Administrator (GPA) user can perform
GPA also allows you to directly edit GPOs in your production environment. For more information about directly working with GPOs in Active Directory, see Section 6.0, Working with GPOs in Active Directory.