There is distantly related Russian instrument gusli.
But luckily for us we did wrote thing or two about ourselves during our history. Byzantines caught two Slav spies with guess what? First mention of gusle among Serbs was from XII century, whne Friedrich Barbarosa met with Stefan Nemanja (I hope you do not consider him non Serb), it was near Niš which is not in Montenegro. Most famous gusle player was Filip Višnjić from Ugljevik, (It is in Bosna near Serbian border), well to cut the story it is traditional in all Serbian areas except Vojvodina.
PS even Poles in XVII century were writing about Serbian gusle.
Other than that I dont have much to say, since this is just part of human genome, and researchers using similar methods offten getd different results.
Serbs were closest to Greeks among south Slavs, and had most contact with them, and of course there is no chance they took them from us, no no : because of how could ever Serbs have something that is not originally theirs.
Either way, who took it from whom is not important, because we both have them, end of story