If you want to setup the official GeforceNow app on Linux for gaming, use:
flatpak install -y --user flathub org.freedesktop.Sdk//24.08 org.freedesktop.Platform//24.08flatpak remote-add --user --if-not-exists GeForceNOW https://international.download.nvidia.com/GFNLinux/flatpak/geforcenow.flatpakrepoflatpak install -y --user GeForceNOW com.nvidia.geforcenowflatpak run com.nvidia.geforcenow- If you are on Wayland and the Window doesn't open:
flatpak override --user --nosocket=wayland com.nvidia.geforcenow, then launch again.
Alternatively: