CGSI
| Acronym | Definition |
|---|---|
| CGSI | Czechoslovak Genealogical Society International (St. Paul, Minnesota) |
| CGSI | Consumer Guidance Society of India |
| CGSI | Comitato Giovani Sordi Italiani (Italian: Committee for Young Deaf Italians) |
| CGSI | Championship Golf Services, Inc. (California) |
| CGSI | Ciena Government Solutions, Inc. (Linthicum, MD) |
| CGSI | Cable Group South, Inc. (Delaware) |