[quote=GuyYouWishYouDidntKnow]
As long as something is under the seven heavens a disclosive sketch of its existence can be confirmed by looking in the cup~But regardless, that was just to point out those exist. He also has the original "omniscience granting existence" in the vault. Didn't say he used them. Well, except the last one. That's a passive. But I disgress. Not my fight. You kids have fun.
[/quote]

Looked up Gilgamesh. Neither in the anime nor in classic mythology does he have the ability to know his opponent's abilities. Unless, of course, he has the power to store abilities in Babylon's Gate as well?