Open Group Policy Management Console [best] [ 2027 ]

if (!System.IO.File.Exists(gpmcPath)) throw new Exception("GPMC not installed. Install RSAT.");

var psi = new ProcessStartInfo

FileName = gpmcPath, UseShellExecute = true, Verb = IsAdmin() ? "" : "runas" // Request admin if not elevated ; open group policy management console

Process.Start(psi);