powerscripts/bin/copygroupmem.ps1

param(
    [Parameter(Mandatory=$true)]
    $from,
    [Parameter(Mandatory=$true)]
    $to
)

(Get-ADUser $from -Properties memberOf).memberOf | get-adgroup | Sort-Object | Out-GridView -Title "Select Groups to copy from $from to $to" -OutputMode Multiple | %{ 
    $_
    Add-ADGroupMember -Identity $_ -Members $to 
}