Source : Webster's Revised Unabridged Dictionary (1913)

Gael \Gael\, n.sing. & pl. [See {Gaelic}.] (Ethnol.)
   A Celt or the Celts of the Scotch Highlands or of Ireland;
   now esp., a Scotch Highlander of Celtic origin.

Source : WordNet®

Gael
     n : a Gaelic-speaking Celt in Ireland or Scotland or the Isle of
         Man