Glynnis Lessing, An Artist’s Blog. In this blog Glennis teaches gnome making to some people, at least two of whom had never done anything in clay before. There are photos of not only Glennis’s gnome but also some of her students along with step by step instructions.
Mont Marte. I found this really helpful for the faces in particular. There is a YouTube video of Mont making a gnome as well as a materials list (which is more than a little partisan since he seems to make his living selling art supplies) and a downloadable PDF.
Instructables There is a rather good page here where Nathan Sellers shows how he made a female gnome for his mother’s Christmas present. As he rightly points out they are quite hard to come by otherwise.