What does GNU stand for?

Gannon's Custom Boats, Riverside, CA - Manufacturer code for watercraft hull identification number (USCG)

Geologic Names Unit (SAUS)

Gnau - Language code (ETLW)

GNSS- Global Navigation Satellite System Navigation Unit (XSAL)

"GNU's Not Unix" - Computer science (FOTI)

Golden Rule Resources Ltd. - Toronto Stock Exchange symbol

Goodnews Bay - Alaska - Airport symbol (OAG)

South African Government of National Unity (SAUO)