> To list all the PowerShell commands available for group policy module:
Get-Command -module GroupPolicy
or
Get-Command *-GP*
> To list all the PowerShell commands available for active directory module:
Get-Command -module activedirectory
or
Get-Command *-AD*
> For more detail information about certain PowerShell commands:
Get-Help (commandname) -detailed
Get-Help (commandname) - examples
Get-Help (commandname) -full
or
Get-help (commandname) -online