gofer / gopher are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
gofer: (noun) an employee whose duties include running errands.
gopher: (noun) burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America.
gofer: NA
gopher: g·OW·f·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)