Green’s Dictionary of Slang

geese n.1

[ety. unknown]

(US street gang) a theft.

[US](con. 1953–7) L. Yablonsky Violent Gang (1967) 81: He talked primarily about his P.O., the ‘geese’ (burglary) for which he was on probation. [...] ‘The geese was nothin’, just that market on Broadway.’.