| Acronym | Definition |
|---|
| FGS | Family Group Sheet (ancestry) |
| FGS | Federation of Genealogical Societies |
| FGS | Free Ground Shipping |
| FGS | Flick Gocke Schaumburg (German law firm) |
| FGS | Fo Guang Shan |
| FGS | Florida Geological Survey |
| FGS | Fine Guidance Sensor |
| FGS | For God's Sake |
| FGS | For Goodness Sake |
| FGS | Fellow of the Geological Society (Geological Society of London) |
| FGS | Flight Guidance System |
| FGS | Fine Granularity Scalability |
| FGS | Fine Granular Scalability |
| FGS | Foundation for Global Sustainability (Knoxville, TN) |
| FGS | Full Genome Sequence (biology) |
| FGS | Final Governing Standards |
| FGS | Female Genital Surgery |
| FGS | Florida Genealogical Society |
| FGS | FG Syndrome |
| FGS | France Gardiennage Sécurité (French: French Security Guarding) |
| FGS | Fine Guidance System |
| FGS | Federal German Ship (German Navy) |
| FGS | Fructose Glucose Syrup |
| FGS | Forum Genevois de la Sécurité (French: Geneva Security Forum; Switzerland) |
| FGS | Free Gaming System |
| FGS | Finished Goods Series (inventory planning software) |
| FGS | Facchina Global Services (La Plata, MD) |
| FGS | Feature Generalization Services |
| FGS | Fine Grained Siliceous |
| FGS | Fast Gibbs Sampler |
| FGS | Free Grace Seminary |
| FGS | Florida Gourd Society |
| FGS | Florida Geological Service |
| FGS | File Guide System |
| FGS | Fire and Gas Safety System |
| FGS | Foreign Ground Station |
| FGS | Flooding Gateway Selection (wireless mobile networking) |