Group creation and modification templates

Group creation and modification templates

I am trying to pass an argument for a PowerShell script when using a Group Creation Template. 

Since this is creating a group, what argument/variable do I need to pass to pass the "Group Name" to PowerShell?

I have tried:
powershell -file script.ps1 -Arg1 %name%
powershell -file script.ps1 -Arg1 %groupName%