For an example of the default Gallery settings and some pictures, you can view my Gallery at
http://darren.clubsnap.org/gallery/
To use the Gallery, you must first login, then on the top right hand corner, there will be a link to create new albums.
You can use html-based webpage to upload photos into the album or download the Java-based Gallery remote desktop software (the software is more applicable if you intend to upload a lot of pics in one go, otherwise the web-based one is fine for up to 10 images at a go).