What does GUT stand for?

Armi Guiseppe Tanfolglio - NCIC firearms make code (NCIC)

Gand Unified Theory (SAUS)

Genitourinary Tract - Medicine (MELL)

Grand Unified Theory - Cosmology

Gulfstream 57, Fort Pierce, FL - Manufacturer code for watercraft hull identification number (USCG)

Gulf Titanium Ltd. - Vancouver Stock Exchange symbol

Gutter (MSA)

Maleku Jaika - Language code (ETLW)

Pittsburgh, PA - Location identifier - FAA (FAAL)