Most of Kiba's weapon's would be on par with Gilgamesh's with the exception of Ea. Kiba is faster but gilgamesh has reaction time with gate of babylon. Kiba can still counter everything in the noble phantasm do to speed and sword birth.
I think it comes down to durability and Kiba is somewhere around state or continent level +.
Kiba is Massively FTL+
It comes down to Ea and most of the time Kiba can get out of Ea's range.