A read-only status string reporting whether the Contivity's Global Demand Services feature, which manages on-demand dial interfaces, is Healthy or Disabled. Demand-based connections are used for backup or on-demand WAN links, so knowing this service is Healthy assures the admin that failover dial-up paths can actually be triggered if needed. An admin auditing backup-link readiness would check gdsServer before a planned primary-link outage to confirm demand dialing isn't sitting in a Disabled state.