He enrolled at the Academy of Fine Arts in Zagreb in 1927. He graduated in 1936 in Prof Marin Tartaglia’s class. He spent the period just before the WWII as a drawing teacher at high schools in Mostar and Slavonski Brod. He was recognized to be a talented artist at the anthological exhibition Half a Century of the Croatian Art, held in Zagreb in 1938.
The restless and insecure years of the WWII were crucial for his further life, and he returned permanently to his hometown by the end of the WWII and devoted exclusively to painting. He created in his own atelier and occasionally exhibited his works.
He was a member of the Association of Croatian Artists and he exhibited at group exhibitions.During his life he exhibited at seven solo exhibitions, among which particularly noted were those held in Split in 1964, in Sydney in 1975 and his last solo exhibition in Makarska in 1986.In 1986 he received the Award of what was then the Council of the Makarska Municipality. He died the same year.
Antun Gojak mostly painted works of homeland themes with recognizable motifs of landscape and everyday life of people living in Makarska and the Littoral. The changes in his art expression go from the academism to the dynamic expressiveness dominated by colour.A similar range of art expression is found in another great cycle within his opus. It is the case of the paintings created during the artist’s travels to the Czech Republic, Slovenia, Australia and Bosnia and Herzegovina.