G1
G1, G01, G.I, G-1, or G One may refer to:
Sports
- G1 Climax, an annual professional wrestling singles tournament held by New Japan Pro Wrestling
- Group One, the highest level races in horseracing.
Science
- G1 phase in the cellular cycle
- G1 regulatory sequence for the insulin gene
- ATC code G01 Gynecological antiinfectives and antiseptics, a subgroup of the Anatomical Therapeutic Chemical Classification System
- Alkali metal, Group 1 of the periodic table
- Globular cluster Mayall II
- The giant elliptical galaxy YGKOW G1 that lenses the Twin Quasar
- G1 star, a subclass of G-class stars
Transportation
- G1 Aviation G1, French ultralight aircraft
- G1 Beijing–Harbin Expressway in the People's Republic of China
- Gorkha Airlines, IATA airline designator
- One of the G-series Toronto subway cars
Entertainment
- G.One (character) a super hero titular character of the 2011 Bollywood science fiction film, Ra.One
Products
- Alfa Romeo G1, a 1921 Italian car
- Contax G1, a Rangefinder camera made by Contax Inc.
- DSC-G1, a 2007 Sony Cypber-shot G series camera model
- DSER Class G1, a Dublin and South Eastern Railway Irish steam locomotive
- PowerPC 601 (PowerPC G1)
- PowerShot G1, a Canon camera
- PRR G1, an American PRR 4-6-0 steam locomotive
- HTC Dream, also known as the T-Mobile G1, the first publicly available Android smartphone
- Transformers: Generation 1, referring to the first Transformers incarnation
- Panasonic Lumix DMC-G1, a digital camera made by Panasonic
Organizations
- g1, an official ScrewAttack designation
- G1 Group, a Scottish hospitality and leisure operator
Military
- G1 is the designation used by the South African Army for the Ordnance QF 25 pounder
- G-1 (submarine), a class of early-20th century submarines constructed by the Lake Torpedo Boat Company of Bridgeport, Connecticut and purchased by the United States Navy
- Char G1, a French tank
- The designation used by the West German and Turkish armies for the FN FAL rifle
- G.I, a German designation for several World War I heavy bombers:
- AEG G.I
- Albatros G.I, a German aircraft whose development was the Albatros G.II 1916 aircraft
- Friedrichshafen G.I
- Gotha G.I
- Hansa-Brandenburg G.I, a 1916 bomber aircraft
- Fokker G.I, a 1937 Dutch heavy twin-engined fighter plane
- G-1 military flight jacket, a type of flight jacket
- Kampfgeschwader 55, from its historic Geschwaderkennung code G1 with the Luftwaffe in World War II
Other
- G1 (Rede Globo), a Brazilian news portal
- G1 licence, the first tier in the graduated licensing programme for Ontario's new drivers
- In ISO 2022 character sets, one of 4 groups of characters that may be swapped into the encoding space via control codes