How to check if a newly created gpo updated on the all domain controllers

Open the command prompt on a domain controller where you created the new gpo and execute the followinng command:

              gpotool.exe /gpo:Newly_Created_GPO_Name_Here /verbose


If the policy has replicated to all the domain controllers, you will see a "Policy Ok" message. If it has not replicated accross yet, then the tool will list the names of the domain controllers who has not received this GPO yet.