Hey Johnathan,
I'm not in a position to speak to any future plans one way or the other on getting
MySQL Enterprise Audit (I assume this is what you're referring to) running on Cloud SQL, but at the very least, you can
open a Feature Request in the Cloud SQL Public Issue Tracker so that you can receive updates. In the meantime, a workaround is to run MySQL instances off of Compute Engine VM's and get full access to modify the machines that way.
Cheers,
Nick
Cloud Platform Community Support