Essentially, the God the saurians worship is the Great Saurian, which is genuinely just Jesus Christ of Christianity but how He'd appear to the dinosaurs. I know it sounds a little goofy to non-readers of Connected Skies, but we keep it subtle.
You all are free to go into as much depth with the Great Saurian as you want, and Christians may feel comfortable to write characters that worship Him because in every way He is our God. He is the Christian God.
That said, if you are an atheist or just don't feel otherwise comfortable writing about the Great Saurian, feel free to distance yourself. It's not integral to the plot, except maybe in small scale ones.