| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| G. L. Garcia | city | Puerto Rico | United States | 18.12944 | -66.10444 | 1499 | 73774 |
| Galateo | city | Puerto Rico | United States | 18.36444 | -66.25917 | 101 | 84549 |
| Galateo Bajo | city | Puerto Rico | United States | 18.4575 | -67.00361 | 383 | 41367 |
| Galicias | city | Puerto Rico | United States | 17.99583 | -66.515 | 3 | 29715 |
| Gandara | city | Puerto Rico | United States | 18.1775 | -66.14639 | 1410 | 65705 |
| Garcia | city | Puerto Rico | United States | 18.14583 | -67.15611 | 36 | 44271 |
| Garden Hills | city | Puerto Rico | United States | 18.40083 | -66.11444 | 88 | 333328 |
| Garita | city | Puerto Rico | United States | 18.09778 | -67.17528 | 91 | 19408 |
| Garona | city | Puerto Rico | United States | 18.01278 | -65.92639 | 160 | 28518 |
| Garrochales | city | Puerto Rico | United States | 18.45972 | -66.61139 | 127 | 29142 |
| Garrochales | city | Puerto Rico | United States | 18.45556 | -66.56667 | 32 | 46048 |
| Guanabana | city | Puerto Rico | United States | 18.01306 | -67.1175 | 45 | 27968 |
| Guanaiibo | city | Puerto Rico | United States | 18.14528 | -67.13806 | 59 | 44271 |
| Guanajibo Castillo | city | Puerto Rico | United States | 18.16667 | -67.15528 | 55 | 49068 |
| Guanica | city | Puerto Rico | United States | 17.97361 | -66.90833 | 269 | 24853 |
| Guaniquilla | city | Puerto Rico | United States | 18.06611 | -67.18 | 177 | 17865 |
| Guaraguao | city | Puerto Rico | United States | 18.12722 | -66.67056 | 1587 | 38253 |
| Guayabal | city | Puerto Rico | United States | 18.08333 | -66.50167 | 449 | 54625 |
| Guayabo Dulce | city | Puerto Rico | United States | 18.19139 | -66.81194 | 1945 | 21131 |
| Guayama | city | Puerto Rico | United States | 17.98611 | -66.11417 | 144 | 32036 |
| Guayanilla | city | Puerto Rico | United States | 18.02111 | -66.79222 | 209 | 30029 |
| Guaydia | city | Puerto Rico | United States | 18.02583 | -66.78944 | 209 | 25784 |
| Guaynabo | city | Puerto Rico | United States | 18.35944 | -66.11139 | 141 | 320740 |
| Guaypao | city | Puerto Rico | United States | 18.01583 | -66.73222 | 226 | 32488 |
| Gurabo | city | Puerto Rico | United States | 18.25639 | -65.97333 | 213 | 101785 |
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