Gap
- .45 GAP
- Air Philippines
- Air gap (networking)
- Band gap
- G Adventures
- GAAP (disambiguation)
- GAP (computer algebra system)
- GAP insurance
- GIMP
- GTPase-activating protein
- Gallium(III) phosphide
- Gap
- Gap (Mandaeism)
- Gap (chart pattern)
- Gap (landform)
- Gap Analysis Program
- Gap Broadcasting Group
- Gap FC
- Gap Inc.
- Gap Mangione
- Gap theorem (disambiguation)
- Gap year
- Gap, Alberta
- Gap, Hautes-Alpes
- Gap, North Carolina
- Gap, Pennsylvania
- Gaps (disambiguation)
- Garmisch-Partenkirchen
- Generalized assignment problem
- Generic access profile
- Giangiacomo Feltrinelli
- Global Animal Partnership
- Glyceraldehyde 3-phosphate
- Good agricultural practice
- Government Accountability Project
- Graph automorphism
- Great Allegheny Passage
- Great Ape Project
- Group for the Advancement of Psychiatry
- Group of Personal Friends
- Grupo Aeroportuario del Pacífico
- Gruppi di Azione Patriottica
- Guyana Action Party
- Iranian applications
- Parasitic gap
- Southeastern Anatolia Project
- The Gap (disambiguation)
- Treefall gap