What does GIO stand for?

Black Mag, Coral Springs, FL - Manufacturer code for watercraft hull identification number (USCG)

Gas Identification Officer

Gastrointestinal Obstruction - Medicine (MELL)

Generalist Intelligence Officer

Generic Interface for Operations - Telecommunications

Geographic Information Officer (SAUO)

Geographic Investigations Office (SAUS)

Geograpic Investigations Office (SAUS)

Geospatial Information Office (GIS)

Giocossamente - Humorously - Music (ROG)

Glucocorticoid-Induced Osteoporosis - Medicine

Golden Trio Minerals - Vancouver Stock Exchange symbol

Government Information Organization - Later, NAGC

Grease and Industrial Oil - Fuels and lubricants

Group Intelligence Officer - British military (DMA)

Guaranteed Insurability Option

Guarantee Insurability Option (SAUS)

Guild of Insurance Officials - British (BI)

Regionnair, Inc. - Canada - ICAO designator (FAAC)