So i found a Turkish song, the title is "nerde gidenlerumuz". But i couldn´t find the meaning of "gidenlerumuz" (in the standard form is gidenlerimiz).

If :

Giden means someone who goes, and

Gidenler means those who go, so

What does the gidenlerimiz mean?

nerde gidenlerimiz  is a question

where are we going?  or where is our destination?

giden = the one that goes/leaves

gidenler = those that go/leave

gidenlerimiz = those of us that go/leave

nerede gidenlerimiz? where are those of us that have left (here/this world/etc.)