Can google sites/apps be installed on your own infrastructure say the way Drupal or Wordpress could?
I can't seem to find resources pointing me towards the way to do this. Appreciate any pointers.
Simply put: No .
Google sites/apps have tiers of 'security'/'privacy' (Government, education, business); but nothing you can put on your own hosts.
No, in short. A lot of the marketing towards it is geared around the fact that it will be a decentralised, outsourced, managed system. Locally hosting would pretty much defeat the point.