goopg software package provides GPG for Chromium GMail, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install goopg
goopg is installed in your system.
Make ensure the goopg package were installed using the commands given below,
$ sudo dpkg-query -l | grep goopg *
You will get with goopg package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | |
| Package | goopg |
| Version | 0.3.1-4 |
| Description | GPG for Chromium GMail |
| Sub Section |