From WordNet (r) 3.0 (2006) :
gm
n 1: a metric unit of weight equal to one thousandth of a
kilogram [syn: gram, gramme, gm, g]
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :
GM
General MIDI [standard] (MIDI)
From The Free On-line Dictionary of Computing (30 December 2018) :
gm
The country code for Gambia.
(1999-01-27)