| Great Gully Brook | |
|---|---|
 Waterfall on Great Gully Brook | |
 | |
| Location | |
| Country | United States |
| State | New York |
| Physical characteristics | |
| Mouth | Cayuga Lake |
• location | Farleys, New York, United States |
• coordinates | 42°48′34″N 76°42′50″W / 42.80944°N 76.71389°W |
Basin size | 15 mi2 (39 km2) |
Great Gully Brook is a river located in Cayuga County, New York. It flows into Cayuga Lake by Farleys, New York.