Follow these simple steps to start using Flatpak
To install Flatpak, enable the ~amd64 keyword for sys-apps/flatpak, acct-user/flatpak and acct-group/flatpak:
Then, install Flatpak:
Flathub is the best place to get Flatpak apps. To enable it, run:
To complete setup, restart your system. Now all you have to do is install some apps!
Note: graphical installation of Flatpak apps may not be possible with Gentoo.