Microsoft recently released a nice little freebie which lets you compare “sets” of GPOs to help you determine GPO settings overlap.
Check it out.
Link: http://blogs.technet.com/b/secguide/archive/2016/01/22/new-tool-policy-analyzer.aspx
the second tool is the spiritual successor to LocalGPO, and is called LGPO. This helps you take many settings and deliver them to Local GPOs instead of via AD-based GPOs.
Check it out.
And enjoy !