Gusti Laz is located in the City of Delnice, in Primorje-Gorski Kotar County at an elevation of 220 meters above sea level and it covers the area of 3.77 km² (1.46 sq. miles). According to the 2011 census report, there were 4 inhabitants. It is largely populated by Croats (86%), but also Roms (14%). Nearby places: Zapolje Brodsko, Krivac, Brod na Kupi, Guče Selo, Grbajel, Velika Lešnica, Zamost Brodski, Iševnica, Ševalj and Mala Lešnica.