Bojan had been keen on a return to Spain as he sought more game time than he might be guaranteed under Mark Hughes.
He had a few options but Girona talks fell through and he was happy instead to put pen to paper on a season-long loan deal with Alaves.
“I had the option to go to Girona but finally the negotiations broke down," the 27-year-old forward told RAC1.
Bojan was also wanted in France and Germany while Malaga were among the clubs keen in La LIga.
He added: “I was very clear that I wanted to go back to Spain. Whoever I most value is who really loves me, and in this sense, Alavés are the ones who have shown the most interest in having me."