According to Sportske Novosti, Gastaldelo has joined Croatia Zmijavci.

Leoni Gastaldelo, a 22-year-old Brazilian winger, is moving from Vukovar to Croatia Zmijavci. This transfer is part of a broader departure of players from the club. Gastaldelo joined Vukovar from Cibalia last summer and was considered one of the best players in the SuperSport 1. NL at the time. He did not secure a regular position in the team under coach Silvijo Čabraja. Across 18 SuperSport HNL rounds, he made four appearances and played for a total of 98 minutes, without recording any goals or assists. His contract with Vukovar was set to expire in the summer, and according to Transfermarkt, his value is 150,000 euros.