CGG may refer to:

• CGG (company), a multi-national geophysical services company, formerly known as CGGVeritas, and Compagnie Générale de Géophysique
• Canadian Grenadier Guards, infantry regiment of Canada's military reserve force
• Church of the Great God, headquartered in South Carolina, US
• Campaign for Good Governance, in Sierra Leone

• CGG, a codon for the amino acid arginine
  • CGG repeats, a trinucleotide repeat disorder; causing:
    • Fragile X syndrome
    • Fragile X-associated tremor/ataxia syndrome

• Kiga language (ISO-639 language code), a Great Lakes Bantu language

• DNA and RNA codon tables

This disambiguation page lists articles associated with the title CGG.
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