Surname Gamoga (Gamoga 
) , globally, is a rare last name. The last name Gamoga is characteristic of Papua New Guinea, where it is quite a rare surname, Australia, where it is a very rare surname, and New Zealand. Measured by absolute frequency, it is commonest in Papua New Guinea, Australia, and South Africa.
| VARIANT | COUNTRY |
|---|---|
| Gamoga | Australia, New Zealand, South Africa, Papua New Guinea |