Gretna
- Gretna (butterfly)
- Gretna F.C.
- Gretna F.C. 2008
- Gretna Green
- Gretna Green railway station
- Gretna railway station (Border Union Railway)
- Gretna railway station (Caledonian Railway)
- Gretna, Dumfries and Galloway
- Gretna, Florida
- Gretna, Kansas
- Gretna, Louisiana
- Gretna, Manitoba
- Gretna, Nebraska
- Gretna, Ohio
- Gretna, Tasmania
- Gretna, Virginia
- Mount Gretna Heights, Pennsylvania
- Mount Gretna Narrow Gauge Railway
- Mount Gretna, Pennsylvania
- grass skipper
