About 10 people with faimily name Gudalj live in Croatia today, in households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only one small Croatian place, in Gudalji (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1927 in source Emigration Commission Zagreb.