Changing ProxyingEnabled property of SCOMGatewayManagementServer object

The cmdlet

Get-SCOMGatewayManagementServer -Name $FQDN | select *

returns output like

IsRootManagementServer                : False
IsGateway                             : True
AemEnabled                            : False
AutoApproveManuallyInstalledAgents    : True
RejectManuallyInstalledAgents         : False
MissingHeartbeatThreshold             : 2
ManagementGroup                       : OMxxxMG
Id                                    : 994a0088-4xxx-6cb5fcf33bf5
LastModified                          : 10/13/2017 7:00:33 AM
Name                                  : a-scom-02-vm54.xxx.com
DisplayName                           : a-scom-02-vm54.xxx.com
HostComputer                          : a-scom-02-vm54.xxx.com
HostedHealthService                   : a-scom-02-vm54.xxx.com
HealthState                           : Warning
PrincipalName                         : a-scom-02-vm54.xxx.com
NetworkName                           : a-scom-02-vm54.xxx.com
ComputerName                          : a-scom-02-vm54
Domain                                : sxxx
IPAddress                             : 10.11.10.254, fe80::1c82:1d9:96d1:b01c
Version                               : 7.1.10226.0
RequestCompression                    : True
CommunicationPort                     : 5723
MaximumSizeOfAllTransferredFilesBytes : 0
MaximumQueueSizeBytes                 : 104857600
ManuallyInstalled                     : False
InstallTime                           : 10/11/2017 1:44:42 PM
InstalledBy                           : 
CreateListener                        : True
AuthenticationName                    : a-scom-02-vm54.xxx.com
ActionAccountIdentity                 : SYSTEM
HeartbeatInterval                     : 45
ProxyingEnabled                       : False
ManagementGroupId                     : 00000000-0000-0000-0000-000000000000

where

Get-SCOMGatewayManagementServer -Name $FQDN  | Get-Member -Name ProxyingEnabled

shows that

   TypeName: Microsoft.EnterpriseManagement.Administration.ManagementServer

Name            MemberType Definition                                                                                          
----            ---------- ----------                                                                                          
ProxyingEnabled Property   Microsoft.EnterpriseManagement.Administration.SettablePropertyValue[bool] ProxyingEnabled {get;set;}

This ‘ProxyingEnabled’ property can be changed in the OPs Mgr Console. Is there anyway to change it via PS or any command line EXE?
More details here

resolved:

$MS=Get-SCOMGatewayManagementServer -Name $FQDN 
$MS.ProxyingEnabled=$true
$MS.ApplyChanges()