GitHub Gallery is a simple photo gallery, which simply displays all the images it finds in the /images/ folder. It's powered by the Jekyll blog engine, and will work on any such powered pages, for example GitHub Pages.
Images will display up to a max width of 900 pixels. Images larger than 900 pixels will show their full size if you click it.
You can link to a specific image as they're link anchored. Just click on the specific image and copy the browser URL.
There are two simple steps:
Your GitHub Gallery should shortly after be available at https://YOUR_USERNAME.github.io/github-gallery/.
You can ofcourse delete the old images, as well as renaming your repository for a prettier url.