Is Gaster Sans dad?

Gaster is not father to Sans | Fandom. Here’s some facts that may prove that Gaster is not the Father of Sans and Papyrus. Remember: This is just a theory, you choose what you think.

Is Gaster Sans dad in Glitchtale?

All information taken directly from Glitchtale Wikia. Gaster is the Father of Sans and Papyrus, revealed in the video Camila provided in a caption (hidden in a video). His first Appearance was at the video “Yet Darker” as an enemy who wanted Frisk’s soul but was eventually defeated.