Remotely run commands in a GUI PowerShell window

Invoke-GUICommand-Example.ps1

$ComputerName = "PC001", "PC002", "PC003" # ...

Invoke-GUICommand.ps1 -ComputerName $ComputerName -ScriptBlock {
    echo "Hello World!"
    pause
}

Invoke-GUICommand.ps1

param(
    [string]$ScriptBlock="",
    [string]$Credential="",
    $ComputerName=""
)

$scriptBlockStr = $ScriptBlock.ToString()

Invoke-Command -Credential $Credential -ComputerName $ComputerName -ArgumentList $scriptBlockStr -ScriptBlock {
    param($scriptBlockStr)
    $taskName = "tmp"
    $A = New-ScheduledTaskAction -Id $taskName -Execute "Powershell.exe" -Argument "Invoke-Command -ScriptBlock { $scriptBlockStr }";
    $T= New-ScheduledTaskTrigger -Once -At (Get-Date);
    Unregister-ScheduledTask -TaskName $taskName -Confirm:$false;
    Register-ScheduledTask -TaskName $taskName -Action $A -Trigger $T;
    Start-ScheduledTask -TaskName $taskName;
    Unregister-ScheduledTask -TaskName $taskName -Confirm:$false;
}