Family name Gyshchak (Gyshchak 
, Гищак 
) , around the globe, is a rare surname. The surname Gyshchak is habitual in Ukraine, where it is a rare surname, Denmark, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Gyshchak | Denmark |
| Гищак | Kazakhstan, Ukraine, Russia |