With the recent release of Google Cloud Scheduler to beta, we’ve published a step-by-step tutorial on using Cloud Scheduler to schedule start/stop of GCE VM instances. Please take a look!
In parallel, we’re also looking into ways to make scheduling VM operations even easier.Bill commented
I know I am bumping an old thread on this, but this is also available for instances on a free tier from www.parkmycloud.com with no instance limits. Unfortunately GCP does not yet support stop/start of its native database services, but this could be a reason to go with a customer-managed DB. -- Bill