The Nuttall Encyclopedia
The Roman proconsul of Achaia in the days of St. Paul, before whom the Jews of Corinth brought an appeal against the latter, but which he treated with careless indifference as no affair of his, in consequence of which his name has become the synonym of an easy-going ruler or prince.
Wood, James, ed. Entry for 'Gallio'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/g/gallio.html. Frederick Warne & Co Ltd. London. 1900.