An intermediate in the combustion of carbon and hydrocarbons, carbon monoxide, is of special importance because it is a poisonous gas, but also economically useful for the production of syngas. Solid and heavy liquid fuels also undergo a great number of pyrolysis reactions that give more easily oxidized, gaseous fuels.
GM is short for General Motors. in text means Good Morning or means Good Move. Also means Genetically Modified.
When you have to leave in a hurry and don't have time for a formal farewell, g2g is your go-to stand-alone text abbreviation. You can follow it up with l8r, ttyl or ttfn.. 1  g4i - go for it.  gab - getting a beer.