Translation:Ke akua pū.
I’m sorry, this was a silly question. “Goodbye” comes from “God be with you”, too, and Hawai‘i was already heavily Christianized as an independent kingdom, so surely all this talk of Jesus is just transparent and colloquial, so that no one is really thinking of Jesus when they say it.
This is what happens when an organization with a Christian background gets its hands on Duolingo's language learning site.
I am going to start asking for sources showing historical uses of these terms, because I really do not remember hearing them in the 20 years I was in Hawai'i and in all the years I spent learning the language. They come across as contemporary hapa haole creations like Hauoli la hanau.