CGG may refer to:

Organisations 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

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

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

See also DNA and RNA codon tables