- g (gramme(s))
- G&A (General and Administration Expenses)
- G/A (Ground to Air)
- G/A or GA (go-around)
- G/C (Gas Condensate)
- g/dl (grams per deciLiter)
- G/FC (gym/fitness center)
- G(M)P (General (medical) practitioner)
- G/S (glideslope)
- G&T (Generation and transmission utility cooperative (electricity))
- G/VLLD (Ground Vehicular Laser Locator Designator)
- G0 (AGCCS Workstation Class Computer)
- G1 (Assistant Chief-of-Staff, Personnel)
- G-1 (Army or Marine Corps Component Manpower or Personnel Staff Officer (Army Division or Higher Staff, Marine Corps Brigade or Higher Staff))
- G10 (Group of 10 (G7 + Belgium, Netherlands, Sweden, Switzerland; numbering 11 in fact))
- G11N (Globalization)
- G15 (Group of 15 (subset of G77, formed 1989: Algeria, Argentina, Brazil, Chile, Egypt, India, Indonesia, Jamaica, Kenya, Nigeria, Malaysia, Mexico, Peru, Senegal, Sri Lanka, Venezuela and Zimbabwe; currently numbers 17))
- G18 (Glock pistol model 18)
- G2 (Assistant Chief-of-Staff, Intelligence)
- G-2 (Army or Marine Corps Component Intelligence Staff Officer (Army Division or Higher Staff, Marine Corps Brigade or Higher Staff))
- G20 (Group of 20 (G8 + Argentina, Australia, Brazil, China, India, Indonesia, Mexico, Saudi Arabia, South Africa, South Korea, Turkey + current European Union presiding country) (1999))