How can I integrate Google Cloud Pub/Sub with InterSystems IRIS (HealthShare)?

I’ve been exploring options for connecting Google Cloud Pub/Sub with InterSystems IRIS/HealthShare, but I noticed that IRIS doesn’t seem to ship with any native inbound/outbound adapters for Pub/Sub. Out of the box, IRIS offers adapters for technologies like Kafka, HTTP, FTP, and JDBC, which are great for many use cases, but Pub/Sub appears to be missing from the list.

Has anyone here implemented such an integration successfully?

For example:

• Would it make sense to leverage IRIS’s Business Service + REST API adapter to connect to Google’s Pub/Sub REST endpoints?
• Or perhaps use an intermediate bridge (e.g., Pub/Sub → Kafka → IRIS) since Kafka adapters are well-supported?
• Another idea might be using InterSystems ObjectScript with gRPC or Python integration to subscribe and publish directly to Pub/Sub topics.

I’d love to hear best practices or proven approaches. If you’ve built a similar integration—whether for Pub/Sub, AWS SNS/SQS, or Azure Event Hubs—your insights would be very helpful.