Trigger FME Flow Automation on GCS file upload

One work around given the lack of a GCS notification source could be to utilize the Pub/Sub notification service in Google Cloud.  Depending on the requirements a cloud function may be necessary but a basic use case pub/sub can call the FME automation’s webhook directly. Pub/Sub admin and Storage admin roles are required to set it up.  Happy to go into more detail if needed.  

https://docs.cloud.google.com/storage/docs/reporting-changes