There are many tutorials out there on how to create your own image gallery. There are simple ones made from pure CSS, and there are complex ones using css and javascript. By the end of this article you will have the information necessary to start building your own photo gallery.
The first tutorial is from cssplay and is one of my favorites around. They have a very elegant and simple image gallery. Your images are separated into different sections (people, plants, animals, etc) and all your images for each section listed nicely underneath. As you hover over each image it expands double it's size so you can take a better look at each image before you view the full version. The interface is very clean and simple to use, I recommend taking a look at this one.