Hey @mrtranwin731,
I spoke to my boss and we need to keep this somewhat proprietary, so for now I can only provide what is already open. In essence, you can connect AirVantage to Google Cloud Functions. Google Cloud Functions allows you specify a handler function each time an “event” occurs on AirVantage.
You can read more about how to get AirVantage connected here: https://doc.airvantage.net/av/howto/cloud/googlePubSub_howto/
and about Google Cloud Pubsub Functions here:
https://cloud.google.com/pubsub/docs/overview
In terms of going directly to Google Cloud IoT (using MQTT), you would be responsible for implementing this. As mentioned above, the mangOH has an MQTT client more or less ready to go, but integrating it with Google Cloud would be up to you (things like authentication, session management).
Edit:
You could always look into updating this project (https://github.com/startwithsierra/mangoh-to-gcloud/tree/red) as well.