MyDataFarming

Definitions of gm:

noun: a metric unit of weight equal to one thousandth of a kilogram

more on this topic on answers.com

Alternative Terms
general-manager grand-master metric-system general-motors metacentric-height standard-gravitational-parameter george-michael gary-moore the-gambia grandmaster-chess mercury-grand-marquis general-mills game-maker gamemaster gamesmaster-magazine garry-s-mod general-midi g-ttinger-miszellen gold-medal-2 linguistic-modality gross-income rgm-79-gm gm1 unified-soil-classification-system metre gram gm-7150m gm-radios pioneer-gm gm-abbreviation sargramostim-leukine gm derry-s-disease norman-landing-disease hexosaminidase tay-sachs-disease a-g-ratio-2 lipodystrophy integral-dose rad-20