G
- Gamlingay: TL236525
- Gamlingay Cinques: TL2252
- Gamlingay Great Heath: TL225515
- Gamlingay Heath Plantation: TL2251
- Gamlingay Wood: TL242535
- Gault Hole: TL435805
- Gee's Spinney (G Spinney): TF105020
- Girton: TL422623
- Glass Moor: TL296928
- Glassmoor Bank: TL2793
- Glatton: TL155860
- Glinton: TF155060
- Godmanchester GP/Tip: TL260720
- Godmanchester (Rectory Farm): TL265695
- Gog Magog Down - See Magog Down
- Gog Magog golf course: TL490540
- Goosetree Farm: TF378012
- Gorefield: TF420120
- Grafham Water: TL1568
- Grafham Water (Dam): TL168665
- Grafham Water (Lagoons): TL155668
- Grafham Water (Littless Wood): TL130682
- Grafham Water (Mander): TL140671
- Grafham Water (Savages Spinney): TL134691
- Grange Farm (Knapwell) - See Knapwell (Grange Farm)
- Grange Farm (Witcham) - See Witcham (Grange Farm)
- Gransden Wood: TL263553
- Granta Park: TL530490
- Grantchester Meadows: TL435555
- Graveley: TL250640
- Great Abington: TL533485
- Great Chishill: TL425390
- Great Eversden: TL365533
- Great Fen [Isleham]: TL605790
- Great Fen Project: TL2286
- Great Gidding: TL120835
- Great Gransden: TL270558
- Great Kneighton: See Trumpington (Clay Farm)
- Great Paxton: TL210637
- Great Raveley: TL255815
- Great Shelford: TL465520
- Great Staughton: TL130648
- Great Stukeley: TL220745
- Great Widgham Wood: TL665554
- Great Wilbraham: TL550573
- Great Wilbraham Common: TL5357
- Grimeshaw Wood: TF160010
- Grunty Fen Tip: TL498778
- Guilden Morden: TL280440
- Gullet Marsh: TL418789
- Gunthorpe: TF183028
- Gunwade Lake - See Ferry Meadows CP
- Guyhirn: TF405040