Hi landguy. Welcome to the forums.
Did you read the article on this gallery? It explains the setup. http://tympanus.net/codrops/2011/09/20/responsive-image-gallery/
Read through that, give it a go and let us know if you get stuck. If you do, post a live link so we can check your work.
EDIT: O, I misread your post. Presumably you have it working but want to add to it. Although it's doable, it might be better to find a gallery that already has numbers. I've seen people try to extend galleries like this, but it can cost a bit and doesn't seem worth it to me. Better to find a gallery that does what you need out of the box. There are hundreds of them.
For example, check out Exposure: http://exposure.blogocracy.org/demos/demo3.html?v=0.9.1