gogonlinux (gog.com on linux) ubuntu install - pfk - shell script.
You find it at my GitHub Gist page:
Press the "View Raw" button, <>, to download it. Make it executable and execute it in a terminal.
This shell script downloads, installs and creates a shortcut on you desktop.
This script installs gogonlinux, wine, dosbox, scummvm and more.
NOTE: PlayOnLinux also have gog.com integration.