Gavinmad
Mr. Poopybutthole
I wouldn't worry too much about it because you still have a fuckload of TMs to grind and you don't even have a Chizuru yet. You can use a Murasame on one Gilgamesh, and just eat the 10% atk loss to equip a sword on the other one. I assume you're nowhere near having either genji glove finished, and having a katana on Gilgamesh isn't that big a deal until he's dual wielding.
Noctis doesn't actually need a katana at all unless you have a third Chizuru TM because unlike Gilgamesh, his katana passive is worth the same amount of atk as his other weapons.
Noctis doesn't actually need a katana at all unless you have a third Chizuru TM because unlike Gilgamesh, his katana passive is worth the same amount of atk as his other weapons.