Gaga, ga-ga, GAGA and other variants, may also refer to:

• Gaga (game), an Israeli form of dodgeball
• Gaga (god), a minor Babylonian deity
• Gaga (dance vocabulary), a movement language and pedagogy used in some Israeli contemporary dance
• Gagá, the name used in the Dominican Republic for a type of Haitian music otherwise known as Rara
• Gaga (film), a 2022 Taiwanese film
• Giọng ải giọng ai (subtitled Hidden Voices), a Vietnamese television game show; part of the I Can See Your Voice franchise
• "Radio Ga Ga", a 1984 song by Queen
• Gaga, a dialect of the Franco-Provençal language spoken in the region around Saint-Étienne, France

• Lady Gaga (born 1986 as Stefani Joanne Angelina Germanotta), American singer, songwriter, and actress
• Gaga Chkhetiani (born 1983), Georgian footballer

• GAGA, an influential paper by Serre on algebraic geometry and analytic geometry
• Gaga (plant), a genus of fern named for Lady Gaga
• Gaga, Central African Republic, a village in Central African Republic
• Gaga (company), publisher of the video game Dark Seed