- Get code for plugin using https://developers.facebook.com/docs/plugins
- Insert into .xml file following format of sample file here
- Upload to Google Sites under Manage Site -> Attachments
- Left click 'Download' and copy link
- Go to page where you would like the plugin to be inserted
- Click Insert -> More gadgets... -> Add gadget by URL
- Paste link to uploaded .xml file
- Make sure at least one
ModulePrefs
is included