Enable and Disable GPOs with PowerShell

Param(
	#Enabled or Disabled, whether you want the GPOs enabled or disabled
	[string]$GPOStatus = $(Throw '$GPOStatus is required'),
 
	#List of GPOs to enable/disable
	[string]$GPOList =  $(Throw '$GPOList is required')
)
Process
{
	$GPO_DISABLED = "AllSettingsDisabled"
	$GPO_ENABLED  = "AllSettingsEnabled"
 
	#Change the specified GPO's GpoStatus property
	function SetGPOStatus( [string]$GPOName, [string]$Status )
	{
		$gpo=Get-GPO $GPOName -server $PDC.ServerName -errorAction SilentlyContinue
		if ( $gpo -eq $null )
		{
			write-host "Could not locate" $GPOName
		}
		else
		{
			$gpo.GpoStatus = $Status
 
			Write-Host "Set"$gpo.DisplayName"to"$gpo.GpoStatus
		}
	}
 
	#Attempt to load a module with Import-Module
	function TryImportModule( [string]$ModuleName )
	{
		if ( (Get-Module $ModuleName ) -eq $null )
		{
			Import-Module $ModuleName
			if ( (Get-Module $ModuleName ) -eq $null )
			{
				Write-Host "Unable to load module" $ModuleName
				return $false
			}
		}
		return $true
	}
 
	# Microsoft module to manage Group Policy
	$retval = TryImportModule "grouppolicy"
	if ( $retval -eq $false )
	{
		return
	}
 
	# Community module that will help retrieve FSMO roles
	$retval = TryImportModule "bsonposh"
	if ( $retval -eq $false )
	{
		return
	}
 
	# Modify the GPOs on the server with the PDC Master FSMO role
	$PDC = Get-Fsmo -role "PDCMaster" -errorAction SilentlyContinue
	if ( $PDC -eq $null )
	{
		write-host "Could not locate PDC Master"
		return
	}
 
	# Validate Status flag input
	if ( $GPOStatus.ToLower() -eq "disabled" )
	{
		$SetFlag = $GPO_DISABLED
	}
	elseif ( $GPOStatus.ToLower() -eq "enabled" )
	{
		$SetFlag = $GPO_ENABLED
	}
	else
	{
		Write-Host "Invalid value '$GPOStatus' for paramGPOStatus. Allowed values: [Disabled|Enabled]".
		return
	}
 
	# Ensure we actually have a list of GPOs in our text file
	if ( (Test-Path $GPOList) -eq $false )
	{
		write-host "Could not locate"$GPOList
		return
	}
	else
	{
		$AllGPOs = Get-Content $GPOList
		if ( $AllGPOs -eq $null )
		{
			write-Host $GPOList" is empty."
			return
		}
		foreach ( $myGPO in $AllGPOs )
		{
			if ( $myGPO.SubString(0,1) -ne "#" ) #Allows comments in the text file
			{
				SetGPOStatus $myGPO $SetFlag
			}
		}
	}	
 
}