A narrow triangular piece of land. The word goes back to the Low Latin gora: Radulfus tenet unam goram terræ, 13th c., N.E.D. See also other notes in the same.
1799. The lands called The Gore in New York depend on the same principles as our Luzerne lands.The Aurora, Phila., Dec. 2.
1887. I wasnt born in any town whatever, but in what New Englanders call a gorea triangular strip of land that gets left out somehow when the towns [townships] are surveyed.G. W. Sears, Forest Runes, p. vii. (N.E.D.)