I am trying to create a Global Integration of type "Google Cloud's operations suite" (a.k.a. GoogleStackdriver) and auto-assign Responders in opsgenie based on policy labels in Google Cloud Monitoring (GCM). I added a policy label in GCM and am able to reference it in opsgenie's "Create Alert" rule with {{_payload.incident.policy_user_labels.opsgenie_team}} in some property fields, but the Responders field will not accept this.
Is there any way to dynamically assign Responders via a global Google Cloud Operations Suite integration? I would like to be able to assign Responders to opsgenie alerts originating from GCM without creating a GCM notification channel per opsgenie team or creating an alert filter per team in the opsgenie alert rule.