I'am actually looking for something similar. Did you find any solution for this?
I would like to “push” a local cups printer to a droplet so as to use it from a remote site. The local network is very restricted so I cannot access it from the outside. Only way I figure is to somehow tunneling traffic between a local cups server and a droplet.
Is there anyway to get this working?

Hi All,

I just found this article, I’m going to try it, I’ll let you know about the results.

https://medium.com/the-sysadmin/google-cloud-print-on-ubuntu-16-04-in-10-minutes-1f0bf97ba9d3