The Hugo Award is given annually by the World Science Fiction Society (WSFS). The distinguishing characteristics of the Hugo Award are that it is sponsored by WSFS, administered by the committee of the World Science Fiction Convention (Worldcon) held that year, and determined by nominations from and a popular vote of the membership of WSFS. In general, a Hugo award given in a particular year is for work that appeared in the previous calendar year.
The Gandalf Award was an award which was administered by the Worldcon Committee and determined by the Hugo nomination and voting mechanism. It was sponsored by Lin Carter and S.A.G.A.
Taken from
ftp://sflovers.rutgers.edu/pub/sf-lovers/Awards