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.

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
G1, a cloud that passed by Sagittarius A* around 2001-2002
G1, an informal group of fossil bird eggs from the Gobi desert that were later named Gobioolithus minor

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
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

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

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
G.One (character), a super hero titular character of the 2011 Bollywood science fiction film, Ra.One
Gangwon No.1 Broadcasting, a Seoul Broadcasting System television channel in Gangwon Province