On the domain controller, open the group policy management tool.
Create a new group policy.
Enter a name for the new group policy.
In our example, the new GPO was named: MY-GPO.
On the Group Policy Management screen, expand the folder named Group Policy Objects.
Right-click your new Group Policy Object and select the Edit option.
On the group policy editor screen, expand the Computer configuration folder and locate the following item.
Create a new environment variable.
Select the type of environment variable.
Enter a name to the environment variable.
Enter a value to the environment variable.
To save the group policy configuration, you need to close the Group Policy editor.
Congratulations! You have finished the GPO creation.