If you're using gtk3 the settings are in the
libgtk-3-common package in
/usr/share/themes/Emacs/gtk-3.0/gtk-keys.css and you can enable them with:
gsettings set org.gnome.desktop.interface gtk-key-theme "Emacs"
And to switch back:
gsettings set org.gnome.desktop.interface gtk-key-theme "Default"
If you're using gtk2 the settings are in the
libgtk2.0-common package in
/usr/share/themes/Emacs/gtk-2.0-key/gtkrc and you can enable them with:
gconftool-2 --type=string --set /desktop/gnome/interface/gtk_key_theme Emacs
And if you want to customize the keybindings you can copy the settings into
cp -r /usr/share/themes/Emacs /tmp/.themes/
ps. so does this mean you've managed to win the battle against Unity to steal all your modify keys back for Emacs to use?! :)