Gaizka Larrazabal was born in Bilbao and is the son of legendary Athletic left-back Aitor Larrazabal. Being raised in a household that loves Athletic, young Gaizka dreamed of playing for the same club as his father but began his youth development at Danok Bat and Zamudio. In 2017 the winger finally signed with Bilbao Athletic where it didn’t take long for him to show his potential. After two years he had featured in 64 matches and scored 11 goals which saw the club reward him with a new contract and promotion to the first team for the 2019/2020 season. Larrazabal made his first team debut on 24 August, 2019 in a 1-1 draw against Getafe.
Gaizka Larrazabal is under contract through 2021 with an undisclosed release clause.