Career
Zajkov began his football career with FK. Born in Skopje, Gjoko Zajkov was playing in Macedonia for the youth team of Rabotnichki, until the summer in 2012 when he made his first appearance for the senior team of the club, competing in the Macedonian First League. He was chosen for best defender that year, at an age of 17.
On 23 June 2014 he left Macedonia to engage with the French club, for whom he signed a three-year contract. After his first season in France, where he spent the majority of the time playing for the youth team of Rennais only, in the summer of 2015 he got loaned for one year in Belgium to play for Charleroi.