What does GUD stand for?

Conqueror Power Boats LLC, Opa Locka, FL - Manufacturer code for watercraft hull identification number (USCG)

Good - Amateur radio shorthand (WDAA)

Goundam - Mali - Airport symbol (OAG)

Grand Unified Debugger (SAUS)

Guarded - Telegraphy (PCTE)

Guardian Resources Corp. - Vancouver Stock Exchange symbol

Guide (ABBR)

Guide Lamp - NCIC firearms make code (NCIC)

Yocoboue Dida - Language code (ETLW)