| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Galapagar | city | Madrid | Spain | 40.58 | -4.01 | 2890 | 41207 |
| Gandullas | city | Madrid | Spain | 41.01 | -3.60 | 3349 | 1863 |
| Garganta de los Montes | city | Madrid | Spain | 40.92 | -3.68 | 4284 | 1107 |
| Gargantilla del Lozoya | city | Madrid | Spain | 40.96 | -3.72 | 3408 | 832 |
| Gascones | city | Madrid | Spain | 41.02 | -3.64 | 3349 | 1951 |
| Getafe | city | Madrid | Spain | 40.31 | -3.71 | 1952 | 270631 |
| Gozquez de Abajo | city | Madrid | Spain | 40.23 | -3.56 | 1669 | 12384 |
| Gozquez de Arriba | city | Madrid | Spain | 40.24 | -3.60 | 1847 | 30741 |
| Granja Arenales | city | Madrid | Spain | 40.12 | -3.10 | 1988 | 1202 |
| Grinon | city | Madrid | Spain | 40.21 | -3.85 | 2509 | 25343 |
| Guadalix de la Sierra | city | Madrid | Spain | 40.78 | -3.69 | 2851 | 4646 |
| Guadarram | city | Madrid | Spain | 40.67 | -4.09 | 3349 | 22669 |
| Guadarrama | city | Madrid | Spain | 40.67 | -4.09 | 3349 | 22669 |