What is Gentoo?
Gentoo is a totally free Linux distribution. It uses the latest development tools and software technologies and is dedicated to quality rather than blindly following traditional usage patterns with binary packages and config files. Every part of Gentoo, including installation images, is free software; most of the source code is available to whoever wants it. Gentoo has been developed in an entirely open process, in which technical choices are made via discussion in email forums and IRC channels rather than by secretive members of some elite development cabal. Each package in Gentoo has its own maintainer who decides whether or not to include it; you are welcome to volunteer to Gentoo.
What is Github packages?
The new GitHub Package Registry offers a free and unlimited hosting solution, making it even easier to share and use packages as dependencies. The GitHub Package Registry stores your packages as Git repositories, giving you complete control over their contents. Use the best version of the package, even if it's not the latest. And if you need to use a private package that isn't publicly available, you can easily adopt — or 'steal' — someone else's public package and give credit if appropriate. Open source software and ideas thrive on collaboration and sharing — we're excited to bring new flexibility and possibilities to how open source software is built and
Github packages alternatives for Gentoo
If you’re looking for Github packages alternatives for Gentoo, you could look into packagecloud as a method to handle all of your package management. This means that you won’t need a handful of package managers for Github packages or distributors for Gentoo to get the packages you need. Packagecloud can manage all of your packages in one place so you always know they’re secure and accessible.