Robotframework syntax highlighter for GEdit
sudo cp ./robot.lang /usr/share/gtksourceview-3.0/language-specs/robot.lang
chmod the file /usr/share/gtksourceview-3.0/language-specs/robot.lang
sudo chmod 644 /usr/share/gtksourceview-3.0/language-specs/robot.lang
or per-user
cp ./robot.lang ~/.local/share/gtksourceview-3.0/language-specs/robot.lang
After import the syntax will work .robot files only