Green’s Dictionary of Slang

(US) a general intensifier, very, completely, thoroughly.

1929		C. McKay Banjo 27: Ise a gone-fool nigger with any honey-sweet mamma.
1949		‘Hal Ellson’ Duke 105: They were all good records: Frankie Lane, Sarah Vaughan, Billy Eckstein, all gone good singers. They were goners.
1969		‘Iceberg Slim’ Pimp 191: That young bitch you got is gone lazy.