Hi Gnostic,
I think there are indirect references to Creation and God, in the poems of Lao Tzu.
For ex. one of them talks about the "Mystery of mysteries", smth like this, this is
thought to refer to the highest supernatural Being, i.e. God. I dont have the text at
hand now, but you can check out poems from Lao Tzu and Toshihiko Izutsu's book about
parallelism between Taoism and Sufism (or Islam) in this respect.
About Buddhism, I havent done a serious search about it, whether it has a Creation myth or not.
Cheers