

Gilgamesh battled the various demons of the Rift while there, before running into the Light Warriors again as they made their way through to confront Exdeath.

Gilgamesh appears to help the party defeat Necrophobe. Exdeath banished Gilgamesh to the Interdimensional Rift as punishment for Gilgamesh's repeated incompetence. After they dealt great damage to him, Gilgamesh transformed into his true form, hoping to use the Excalibur only to feel betrayed as the Excalipoor was unable to harm them. Gloating at having taken the blade, Gilgamesh fought them, making note of Galuf's absence. Gilgamesh had already taken its treasure: a blade, the Excalipoor, which he had mistaken the Excalibur, the strongest of swords. When the Light Warriors-with Krile Mayer Baldesion in place of Galuf, who had fallen to Exdeath-infiltrated Castle Exdeath, they attempted to open a treasure chest in the room below Exdeath's throne. Gilgamesh reveals his true form in Castle Exdeath. The Light Warriors prevailed, and Gilgamesh was thrown into the ocean after attempting to take Galuf with him. The Light Warriors battled him once again, with his ally, Enkidu, arriving late to the battle, after having ruffled with Xezat. When Xezat Matias Surgate's fleet sieged Castle Exdeath, Gilgamesh attacked the fleet. After they prevailed, Gilgamesh once again made an excuse for failure by claiming he had remembered something and fled, promising that they would meet again. When the warriors dealt great damage to him, he appeared to balk again, before casting Protect, Shell, and Haste on himself and continuing.

The Light Warriors left across the Big Bridge, where Gilgamesh halted their progress, having hid behind a door waiting for them. This allowed Galuf to save the trio, reuniting the Light Warriors. After Galuf dealt great damage to Gilgamesh, Gilgamesh balked, before masking his failure by saying Galuf had had "enough of a beating today" and warning him to not "step out of line again" before fleeing. Gilgamesh was commanded to guard the three prisoners, but Galuf arrived alone to rescue them. When three of the Light Warriors-Bartz, Lenna Charlotte Tycoon, and Faris Scherwiz-came to Galuf's world, Exdeath imprisoned them in Castle Exdeath, holding them hostage to warn Galuf Halm Baldesion to call of his attack. At some point, Gilgamesh came to work for Exdeath. It is said that the centuries of "blood, sweat, and dust" accumulated on the Genji equipment have made them extremely resistant. The Genji equipment sets were ancient and precious sets of armor from the village passed on to its best warriors upon proving their worth in battle. Gilgamesh grew up in a village of warriors.
