In Croatia, Gak families are predominantly Serbs, rarely Croats (from Bakar ). In the past century, relatively most of Croatian residents bearing this family name were born in Benkovac area and in Rijeka. In Mala Krupska Rujiška in Bosanian Posavina every eighth inhabitant had the family name Gak.
Prevalence
About 40 people with faimily name Gak live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 8 Croatian counties, in 11 cities and two other places, mostly in Zagreb (15), Zadar (<10), Obrovac (<10), Rijeka (<5), and in Praputnjak (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.