Is there official support or documentation for configuring Syslog-NG PE to work with Google Pub/Sub?
At this time Google Pub/Sub is not supported. If this is a required feature Professional Services can assist with setting this up in your environment. Support, at this time, does not assist with issues arising from Google Pub/Sub configurations.
Support for Google Pub/Sub is planned for a future release of Syslog-NG PE. There is no current date or version for this however.