Is a Nemo action to run a program with Bumblebee. When Bumblebee (optirun) is installed, by right-clicking an executable file it shows in the Nemo context menu the "Run with nVidia GPU" option.
For Arch Linux there's an AUR package
Just copy the file run-with-nvidia.action in /usr/share/nemo/actions/ or in $HOME/.local/share/nemo/actions/