What does GNM stand for?

Generic Network Model - Open Systems Interconnection (ODAA)

Genetron Marine, Inc. - Vancouver Stock Exchange symbol

Ghana National Museum (SAUO)

Gino Marine, Miami, FL - Manufacturer code for watercraft hull identification number (USCG)

Ginuman - Language code (ETLW)

Global Network Mission (ACAE)

Golden - New Mexico - Seismograph station code, US Geological Survey (SEIS)

Good News Mission (EA)

Guanambi - Brazil - Airport symbol (OAG)