Originally Posted by
Siriel
Ea isn't a black hole, but I'm pretty sure its best showing is too much for Kenshiro to tank (it's currently creating a glass crater several miles wide as part of clashing against an equivalent attack, but it would scale higher than that from overpowering Excalibur which got an insane firepower feat in F/GO).
Gilgamesh does have a FTL spaceship.
All his attacks can also hit intangible beings so Musou Tensei isn't going to help.
So the big question is if Kenshiro can reach him and pressure point him to death before Gilgamesh can take out some random horrible thing from his arsenal that would end the fight.
I'm not entirely sure how fast Kenshiro is. Gilgamesh ranges somewhere from supersonic to around lightning-level*, depending on how high-end you take his feats.
*: Another Servant shot an arrow at him from over twenty kilometers away. Gilgamesh's automated defense that he had active at the time tried to shoot it down with lightning bolts once it got within twenty meters of him (the range of the auto-defense is given), but the arrow was too fast to strike it properly. Gilgamesh, who started moving after realizing his defense failed, proceeded to slap it out of the air. Note that unlike the usual in fiction, said magical lightning defense is directly stated to be as fast as real lightning.
While this feat isn't from Fate/Zero, it's the same Gilgamesh. Using solely his feats from Fate/Zero, he'd be somewhere in the low supersonic range.