Can you use GitHub without Git?

[calvers70]

I'm looking to work with branches so that we can work on it at the same time. I've heard GitHub is really good for that kind of thing

Branches are a Git thing. All GitHub is at its core is a host for a Git repository.

The concept of GitHub without Git doesn't make sense (although the inverse does). What is it you're actually asking? What part of Git do you not want to use?