Hi Javier,
Could you give a bit more information into what you're looking into? Because if what you need is a connector, then you can look into stack overflow
answers, some of them contain what you want.
If you have a connector or something and you're looking into how to connect to your application, then please let me know if you have a Cloud SQL instance, or a MySQL instance you put in your Compute Engine instance. Also, which connector are you using?
Cheers!