The previous posts showed that it is possible to publish chess games on a blogspot/blogger site. Last week I received a request to help in creating some gadgets with the same purpose. These can be used to publish chess games on a site that is hosted on Google sites (and some other web sites).
The combined efforts (of me and the admin of lessons.chessteacherlessons.com) have resulted in two gadgets that are demonstrated on this Chess Gadgets page.

I still prefer the publishing method for the Blogspot sites, partly because of the limitations, but it's a nice alternative.