Did he live forever like a true God or was he born in some point of time cuontles time ago?

nothing has been stated or even implied to his age so it's useless to assume.

nothing as been stated

all we can do is assume he is as old as the universe

maybe 5

Old enough to consent.

Already exists before the beginning of Dragon ball :)

@omriamarNo real info yet but he must be there since the start or the high priest set him up there as omni king.:

Not old enough to beat goku

Actually i would estimate at somewhere about 3,135,500,603 years old roughly

@rocketlaunch99: I think the high priest is the true boss here not Zeno like you said

Well in the recent episode, it said the tournament would take place on the 3,135,500,603th day of the King's calendar.(Keep in mind that there could have been and most likely were Omni-Kings before Zen-Oh so this is probably useless) And since that's the day the tournament takes place, it's probably a few months or years later so let's just say 3,135,500,270 which is about 8.5 million years old.

There’s no info but he’s 99% most likely older than our universe at the very least (which is universe 7 in drgaon ball).

Idk man... I dont see Zeno as THAT kind of "god", I could totally see the Grand Priest being older than Zeno.

If I had to do a headcanon I'd say some superior being (maybe Zarama) is the true "creator", he made Grand Priest to be his assistant, and then eventually made Zeno? Maybe not intentionally idk, maybe its his child or reincarnation or something, but I don't see Zeno predating the universe or something like that.