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 Opkg?
Opkg is the package management system used on embedded Linux systems, most notably OpenWrt. It was designed to replace the Rpm Package Manager (RPM), Debain packages, Alien packages, and the Red Hat Package Manager (RPM), but it can be used with any Linux distribution. With opkg you can easily download and install software packages from the Internet to keep your router up to date without a lot of hassle.
Opkg alternatives for Gentoo
If you’re looking for Opkg 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 Opkg 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.