GMS manages all the gateways, and provides a REST API located under /gms.
If the WMC server URL is https://wmc.host.com, then:
https://wmc.host.com/docs.https://wmc.host.acom/gms/.application, that is: https://wmc.host.com/gms/application.https://wmc.host.com/gms/application/doc.https://wmc.host.com/gms/application/openapi.