GU, Gu, or gu may refer to:

Arts and entertainment

Universities

• Gandhara University, Peshawar, Khyber Pakhtunkhwa, Pakistan
• Gannon University, Erie, Pennsylvania, United States
• Gauhati University, Guwahati, Assam, India
• Gemeente Universiteit, or Universiteit van Amsterdam, Amsterdam, Netherlands
• Georgetown University, Washington D.C., United States
• Ghazi University, Dera Ghazi Khan, Punjab, Pakistan
• GIFT University, Gujranwala, Punjab, Pakistan
• Gomal University, Dera Ismail Khan, Khyber Pakhtunkhwa, Pakistan
• Gonzaga University, Spokane, Washington, United States
• University of Gothenburg, Gothenburg, Sweden (Swedish: Göteborgs universitet)
• Grantham University, Kansas City, Missouri, United States
• Griffith University, several campuses in Brisbane and the Gold Coast area, Australia
• Guangxi University, Nanning, Guangxi, China
• Guangzhou University, Guangzhou, Guangdong, China
• University Of Guilan, Guilan, Rasht, Iran
• Guizhou University, Guiyang, Guizhou, China
• Gujrat University, Gujrat, Punjab, Pakistan
• Gujarat University, Ahmedabad, Gujarat, India

Businesses

• Gü, a company that produces a range of desserts
• G.U., Japanese clothing brand
• GU Energy Labs, a Berkeley, California-based company that produces sports nutrition products

Medicine

• Gastric ulcer, a disease of the stomach
• Genitourinary system, the reproductive system and the urinary system considered as a whole

People

• Gu (surname), a surname of Chinese origin, also found in Korea
• Gǔ (surname) 谷, meaning valley) came about when a noble family of the Zhou Dynasty was rewarded a fief in a valley area. The descendants of the family adopted the name to link their lineage to that history.
• Gŭ (surname 古), meaning ancient) is uncommon, being the 204th most common surname in China.
• Gū (surname) (辜) the family name Gū (meaning guilt) is very rare
• Gǔ (surname 骨) (meaning bone) is exceedingly rare in China.
• Gene Upshaw, an American football player

Places

• Green Ukraine, after the Russian Revolution of 1917, the Ukrainian Republic of the Far East
• Gu County (Chinese: 古县), Shanxi, China
• Gu, Iran (disambiguation) (Persian: گو), any of several places in Iran
• Gu (administrative division) (Korean: 구), an administrative division of South Korea
• Gu's Park, former name of Fuxing Park in Shanghai, China
• GU postcode area, UK, covering west Surrey, north-east Hampshire, and a part of West Sussex
• Guam (postal code GU)

Other uses

• Gu (god), a god in Haitian Vodou and Yoruba (Africa) mythology
• Gu (poison) (simplified Chinese: 蛊; traditional Chinese: 蠱; pinyin: gǔ; Wade–Giles: ku), in Chinese poison sorcery
• Gu (vessel), a Chinese wine goblet from the Shang and Zhou dynasties, also ku
• Gujarati language (ISO 639-1 language code)
• GU₄ or GUD (𒄞), "bull" in the Sumerian language
  • Gu-anna, the "Heavenly Bull", the Sumerian name for the constellation Taurus
• GU, a prefix for several types of bi-pin connectors for lamp sockets