GBJ may refer to:

• Jersey, a British Crown Dependency (ISO 3166-1 alpha-3 code)
• Marie-Galante Airport, Guadeloupe (IATA code)
• Gutob language (ISO 639-3 code)

• Profile Guided Optimisation
• Profile-Guided Optimisation
• Profile guided optimisation
• Profile-Guided Optimization
• Profile Guided Optimization
• Profile of a Jazz Musician
• Profile of Alhaja Iyabo jolaade adewuyi
• Profile of a Man (Mantegna)
• Profile picture
• Profile Portrait of a Lady
• Profile Projector
• Profiles
• Profiles (album)
• Profiles of African-American Success
• Profiles Theatre Chicago
• PROFILE Systems and Software
• PROFILE -too early to tell-
• Profile (TV series)
• Profiling float
• Profilinota
• Profilinota notaula
• Profilinota phillita
• Profil (song)
• Profinite language
• Profinite word