Google now has a public template gallery for anyone to contribute templates. Follow these steps to submit a template to the gallery:
- Open up the site you want to add to the gallery. Note: the site must be published and you must be an owner to submit the site.
- Select ‘More actions’, ‘Manage site,’ ‘General’, and chose ‘Publish this site as a template.’
- Choose a template name, a category, enter a description and click ‘Submit template.’
- Your site template will appear in the gallery for everyone to see within hours.
Source…Google Templates