The Remote Desktop Gateway role service enables authorized remote users to connect to resources on a corporate network from any Internet-connected device running the Remote Desktop Connection client.
<ClassType ID="Microsoft.Windows.Server.2012.R2.RemoteDesktopServicesRole.Service.RDGateway" Accessibility="Public" Abstract="false" Base="Microsoft.Windows.Server.2012.R2.RemoteDesktopServicesRole.Service" Hosted="true" Singleton="false"/>