I\'m trying to setup my VM based on CentOS 7 with more than one internal IP address, but it doesn\'t seem to be as straightforward as Amazon AWS.
You can add internal IP for VM using routes. (https://cloud.google.com/compute/docs/reference/beta/routes)
Here an example of setting another static internal IP to VM: https://cloud.google.com/compute/docs/networking#staticnetworkaddress