GMO (disambiguation)

A GMO is a genetically modified organism.

GMO may also refer to:
 * Genetically modified food
 * Gell-Mann–Okubo mass formula in particle physics
 * Generalised molecular orbital theory, in chemistry
 * Gulf, Mobile and Ohio Railroad, a U.S. railroad carrier corporation
 * GMO LLC, a Boston-based asset management firm led by Jeremy Grantham
 * GMO Internet, Inc, a Japanese internet services company, and parent of web security company GlobalSign

Music

 * The Glenn Miller Orchestra, a U.S. jazz group
 * Green Mountain Orchestra, a band from Hong Kong
 * "G.M.O. (Got My Own)", 2018 song by Mýa