What are you currently using?

Alternatively, you can also access Group Policy Management by:

If you are on a Windows Server with the Active Directory Domain Services (AD DS) role installed:

The quickest way to open Group Policy Management on any compatible Windows machine is via the Run command box. Press the shortcut on your keyboard. Type gpmc.msc into the empty field. Press Enter or click OK .

Did you encounter any specific when trying the steps above?