The Collaborative International Dictionary of English v.0.48:

Gourd \Gourd\, Gourde \Gourde\ n. [Sp. gordo large.]
   A silver dollar; -- so called in Cuba, Haiti, etc.
   --Simmonds.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gourde
    n 1: the basic unit of money in Haiti