Gamu comprises 16 barangays with an estimated population of 34,521. 8 of its barangays (50%) are connectivity dead zones with no recorded cell tower from either the national registry or crowdsourced data.
| Barangay | Population | Towers | Coverage |
|---|---|---|---|
| Barcolan | 4,759 | 1 | Crowdsourced signal only (no registered tower) |
| Buenavista | 921 | 0 | Dead zone: no towers from any source |
| Dammao | 384 | 0 | Dead zone: no towers from any source |
| District I (Pob.) | 1,160 | 0 | Dead zone: no towers from any source |
| District II (Pob.) | 1,184 | 1 | Crowdsourced signal only (no registered tower) |
| District III (Pob.) | 1,919 | 7 | Crowdsourced signal only (no registered tower) |
| Furao | 3,288 | 0 | Dead zone: no towers from any source |
| Guibang | 2,388 | 3 | Crowdsourced signal only (no registered tower) |
| Lenzon | 1,523 | 1 | Crowdsourced signal only (no registered tower) |
| Linglingay | 693 | 0 | Dead zone: no towers from any source |
| Mabini | 4,076 | 1 | Crowdsourced signal only (no registered tower) |
| Pintor | 1,238 | 0 | Dead zone: no towers from any source |
| Rizal | 1,006 | 0 | Dead zone: no towers from any source |
| Songsong | 1,457 | 1 | Crowdsourced signal only (no registered tower) |
| Union | 955 | 0 | Dead zone: no towers from any source |
| Upi | 7,570 | 21 | Crowdsourced signal only (no registered tower) |