What does GAJ stand for?

Atlanta Junior College, Atlanta, GA - Library symbol - Library of Congress (LCLS)

Gadsup - Language code (ETLW)

Gaseous Axisymmetric Jet

Gravois Aluminum Boats, Jeanerette, LA - Manufacturer code for watercraft hull identification number (USCG)

Guild of Agricultural Journalists

Yamagata - Japan - Airport symbol (OAG)