GSS 3.1 - Variables - PowerShell

Searches of Google and Symantec forums are turning up nothing of value so I am hoping someone on here is aware of a way to pass a variable into a powershell script as a part of a GSS 3.1 task.  Ex.  Passing the name of the PC in the console into a powershell script to rename the PC.

$compName = %SomeGSSVariable%

Rename-Computer -NewName $compName -DomainCredential foo\someCred -force -restart