G1, G01, G.I, G-1, or G One may refer to:

Science and technology

  • 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
  • G1, an informal group of fossil bird eggs from the Gobi desert that were later named Gobioolithus minor
  • Ganesha (psychedelic) (also known as G-1 or Ganesha-1), an amphetamine psychedelic
  • Unitree G1, a humanoid robot from Unitree Robotics

Astronomy

  • Globular cluster Mayall II
  • YGKOW G1, a giant elliptical galaxy that lensed the Twin Quasar
  • G1 star, a subclass of G-class stars
  • G1, a cloud that passed by Sagittarius A* around 2001–2002
  • g1, temporary designation of minor planet , a New Horizons flyby candidate

Computing

  • Garbage-first collector, of the Oracle HotSpot Java virtual machine
  • G1, in ISO 2022 character sets, one of 4 groups of characters that may be swapped into the encoding space via control codes

Cameras

  • Contax G1, a Rangefinder camera made by Contax
  • DSC-G1, a 2007 Sony Cyber-shot G series camera model
  • PowerShot G1, a Canon camera
  • Panasonic Lumix DMC-G1, a digital camera made by Panasonic

Military

  • Ordnance QF 25 pounder (South African Army designation: G1)
  • G-1 (submarine), a class of early-20th century submarines constructed by the Lake Torpedo Boat Company of Bridgeport, Connecticut and purchased by the US Navy
  • Char G1, a French tank
  • G1, 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 (historic Geschwaderkennung code G1), with the Luftwaffe in World War II

Sports

  • G1 Climax, an annual professional wrestling singles tournament held by New Japan Pro Wrestling

Transportation

  • G1 Aviation G1, French ultralight aircraft
  • G1 Beijing–Harbin Expressway, in China
  • Alfa Romeo G1, a 1921 Italian car
  • Gorkha Airlines (IATA airline designator)
  • One of the G-series Toronto subway cars
  • SEPTA Route 15, All Stops service pattern labelled G1

Other uses

  • G1 (website), a Brazilian news portal owned by Grupo Globo
  • G1 Group, a Scottish hospitality and leisure operator
  • G1 licence, the first tier in the graduated licensing programme for Ontario's new drivers
  • G.One (character), an android super hero
  • g<sub>1</sub>, the first term of Graham's number
  • Gangwon No.1 Broadcasting, a Seoul Broadcasting System television channel in Gangwon Province
  • Godzilla Minus One, a 2023 kaiju film often abbreviated to G–1
  • T-Mobile G1, the first publicly available Android smartphone
  • Transformers: Generation 1, a toy line which ran from 1984 to 1992
  • The Transformers (TV series), an animated television series meant to promote the toy line (popularly referred to as Generation 1)

See also

  • 1G (disambiguation)
  • G (disambiguation)