Marko Braić said that he is very horny and nudist. I would not be suprised that he is bisex, but i don't think he is gay.
He likes men, that's obvious, there are gazillion of guys on his following list that have private account, no real name or surname, there must be some kind of regional portal for gay men where they provide instagram account, i don't know how else he would know a medical student from Sarajevo for example, and most of them are followed by other out or in the closet guys like Vladimir Tintor, Vladimir Aleksić, Stipe Kostanić, Davor Garić ...
i can also see that Slovenian actor who was posted here is on 'best of grindr' instagram page, that's Timon Šturbej, that's the only 'gay' thing on his list, nothing else