How can I parse GPO settings and get the GPOApplyOrder?

I have created a script that will search all GPO's in the domain and parse only those which have Drive Map settings and writes the information to a .csv file.  I have tried to figure out a way to get the GPOApplyOrder to no avail.  The closest I have come to any sort of reasonable output is

"@{GPOSettingOrder=}", which is better than the nothing I had been getting.  I think it would be really helpful if I could sort on the appy order so I could see the flow of the applied settings.  Here is what I have.

# ==============================================================================================
# 
# NAME: GetGPO_DriveMappings.ps1
# 
# AUTHOR: Mike
# DATE: 6/17/2014
# Updated: 7/29/2014
# 
# COMMENT: This script will get all the GPO's in the domain.  It will parse only the GPO's that have drive map settings.
#    The results are written to GetGPO_DriveMappings.csv
#    This script is written to be run from the domain that the GPO(s) is in.
#
# NOTE:  The script will not perform any group provisioning. 
# ==============================================================================================

# set Variables and load assemblies
ImportSystemModules
Import-Module GroupPolicy
[void][System.Reflection.Assembly]::LoadWithPartialName('Microsoft.VisualBasic')
$ScriptPath = "R:\Procedural Instructions\Scripts\Get AD Object Info"

# Get drive map settings from all GPOs.
Function Get-DriveMappings
{
# File listing the drive mappings via GPO.
$ExportFile = "GetGPO_DriveMappings.csv"
# Creates .csv file for logging.
    $Header = "GPO Name,Drive Letter,Action,Apply Order,Drive Path,Group,OU,User"
    Set-Content -Path $ScriptPath\$ExportFile -Value $Header

$GPO = Get-GPO -All
    ForEach ($Policy in $GPO)
        {
            $GPOID = $Policy.Id
            $GPODom = $Policy.DomainName
            $GPODisp = $Policy.DisplayName
                 If (Test-Path "\\$($GPODom)\SYSVOL\$($GPODom)\Policies\{$($GPOID)}\User\Preferences\Drives\Drives.xml")
                    {
                        [xml]$DriveXML = Get-Content "\\$($GPODom)\SYSVOL\$($GPODom)\Policies\{$($GPOID)}\User\Preferences\Drives\Drives.xml"
                            ForEach ( $MapDrive in $DriveXML.Drives.Drive )
                                {
                                    $GPOName = $GPODisp
                                    $DriveLetter = $MapDrive.Properties.Letter + ":"
                                    $DrivePath = $MapDrive.Properties.Path
                                    $DriveAction = $MapDrive.Properties.action.Replace("U","Update").Replace("C","Create").Replace("D","Delete").Replace("R","Replace")
$GPOApplyOrder = $MapDrive | Select GPOSettingOrder
                                    $Filters = $MapDrive.Filters
                                    $FilterOrgUnit = $null
                                    $FilterGroup = $null
                                    $FilterUser = $null
                                        ForEach ($FilterGroup in $Filters.FilterGroup)
                                            {
                                                $FilterGroupName = $FilterGroup.Name
                                                    ForEach ($FilterOrgUnit in $Filters.FilterOrgUnit)
                                                        {
                                                            $FilterOrgUnitName = $FilterOrgUnit.Name
                                                            $FilterOrgUnitName = $FilterOrgUnitName -Replace (",",";")
                                                                ForEach ($FilterUser in $Filters.FilterUser)
                                                                    {
                                                                        $FilterUserName = $FilterUser.Name
                                                                        $ExportText = "$GPOName,$DriveLetter,$DriveAction,$GPOApplyOrder,$DrivePath,$FilterGroupName,$FilterOrgUnitName,$FilterUserName"
                                                                            Add-Content -Path $ScriptPath\$ExportFile -value $ExportText
                                                                    }
                                                        }
                                            }
                                }
                }
        }
}
# --End of Function: Get-DriveMappings-------------------------- 
# Notifying that the scripted finished.
Function Script-Finished
{
        [System.Reflection.Assembly]::LoadWithPartialName(“System.Windows.Forms”)
        [Windows.Forms.MessageBox]::Show(“Script completed successfully”,"GetGPO_DriveMappings.ps", [Windows.Forms.MessageBoxButtons]::OK, [Windows.Forms.MessageBoxIcon]::Information)
}
# --End of Function: Script-Finished-------------------------- 
# Main Code:
# Execute the functions
$ErrorActionPreference="SilentlyContinue"
Get-DriveMappings
Script-Finished
$ErrorActionPreference="Stop"