GPO Permission

Need help on how to deny gpo for a specific user in powershell using set-gppermission command?

Everything you need is right here https://technet.microsoft.com/en-us/library/ee461038.aspx

Thanks for the tip, but this help is not helping me. I want to deny a GPO only for one user in an OU. I can do this in GUI by clicking the advanced tab for that user and then select deny against apply GPO setting. I want to accomplish the same in PowerShell.

Looking at that link it looks like this is the parameter you want to be testing.

-PermissionLevel
Specifies the permission level to set for the security principal. The valid permission levels are: GpoRead, GpoApply, GpoEdit, GpoEditDeleteModifySecurity or None.

Thanks for your time.