Is a person who is half Gullah an African American?
The Gullah are known for preserving more of their African linguistic and cultural heritage than any other African-American community in the United States. They speak an English-based creole language containing many African loanwords and significant influences from African languages in grammar and sentence structure. The Gullah language is related to Jamaican Creole, Barbadian Dialect, and the Krio language of Sierra Leone in West Africa. Gullah storytelling, cuisine, music, folk beliefs, crafts, farming and fishing traditions, all exhibit strong influences from West and Central African cultures.
http://en.wikipedia.org/wiki/Gullah

carolina geeche... the natives on gullah Island... still practice many of the Ancient African rituals.... It's fascinating..