An Etymological Dictionary of the German Language/Annotated/gänge

gänge, adjective, ‘current, in vogue, customary,’ from Middle High German gęnge, Old High German gęngi, ‘ordinary, scattered,’ originally ‘capable of going, or rather of circulating’; a verbal adjective from the root gang (see the preceding word), formed like gäbe, angenehm, flügge.