What does GUZ stand for?

Guipuzcoana la Industrial - NCIC firearms make code (NCIC)

Guiratinga - Brazil - Airport symbol (AD)

Gusii - Language code (ETLW)

Gusii - GeoNet three-character language code (GEON)

Osage Canoes LLC, Lebanon, MO - Manufacturer code for watercraft hull identification number (USCG)