Hello world!

 https://codelabs.developers.google.com/codelabs/cloud-create-cloud-sql-db/index.html?index=..%2F..index#8  
https://cloud.google.com/community/tutorials/run-wordpress-on-appengine-standard
https://cloud.google.com/sql/docs/mysql/connect-admin-ip#install-mysql-client
https://cloud.google.com/sdk/gcloud/reference/app/deploy
https://wordpress.org/plugins/gcs/

Domain Mapping:
https://wordpress.org/plugins/wordpress-mu-domain-mapping/#developers

Setup SLL/TLS

CloudFlare offer free SLL

https://www.cloudflare.com/ssl/

Setup wildcard certificate

https://www.sslforfree.com/

Result https://www.igorbencheci.com/