Here is useful content regarding GitHub Desktop on Linux, including why the official website doesn't list Linux, how to install it, and alternative workflows.
This method sets up a repository so you get updates automatically. github desktop linux download
The easiest way to get started is by downloading the pre-packaged installers from the page. Ubuntu / Debian / Mint: Download the .deb file. Fedora / Red Hat / CentOS: Download the .rpm file. Here is useful content regarding GitHub Desktop on