setup an openvpn server on Google cloud in 10 minutes ? Yes, I did within 10 minites

 a good reference is this link

https://dwdraju.medium.com/setting-up-a-free-openvpn-server-in-google-cloud-platform-gcp-in-less-than-5-minutes-c44655222c31

to quote and quick summarize

1/ reserve an static IP:

2/ deploy an OpenVPN VPC, and link the external address to the static IP above