Hello
Here[1] is the quick-start for deploying “Hello World” application using node.js. You may want to deploy your web application on GAE as described in this document tutorials[2] using node.js and MongoDB.
Having said that, you can find the detailed information [3] about how to use node.js with MongoDB on Google Cloud Platform. Examples[4] provided by the community might help further.
I hope this information helps?
Regards,
Dinesh