noun, plural gas·hous·es [gas-hou-ziz] /ˈgæsˌhaʊ zɪz/.

Origin of gashouse

An Americanism dating back to 1875–80; gas + house Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Word Origin and History for gashouse

1880 as a power-generating station, from gas (n.) + house (n.). By 1926, emblematic of a run-down district of a U.S. city, a typical abode of gangsters.

Online Etymology Dictionary, © 2010 Douglas Harper