Gigmoto comprises 9 barangays with an estimated population of 7,657. 9 of its barangays (100%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Biong | 2,399 | 0 | Dead zone: no towers from any source |
| Dororian | 1,097 | 0 | Dead zone: no towers from any source |
| Poblacion District I | 164 | 0 | Dead zone: no towers from any source |
| Poblacion District II | 546 | 0 | Dead zone: no towers from any source |
| Poblacion District III | 692 | 0 | Dead zone: no towers from any source |
| San Pedro | 1,269 | 0 | Dead zone: no towers from any source |
| San Vicente | 260 | 0 | Dead zone: no towers from any source |
| Sicmil | 598 | 0 | Dead zone: no towers from any source |
| Sioron | 632 | 0 | Dead zone: no towers from any source |