Family name Gmyza (Gmyza 
, Гмыза 
) , in the entire world, is a rare cognomen. The last name Gmyza is habitual in Belarus, where it is a rare surname, Kazakhstan, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Gmyza | Russia |
| Гмыза | Kazakhstan, Russia, Belarus |