theme file is here: [url removed, login to view]
infinite scroll plugin is here: [url removed, login to view]
it will look a bit messy because I'm sending you theme without all my settings but it doesn't really matter for this task, all you have to do is go to grido settings in wp-admin and set default post layout to second icon (4x4) and import dummy content (sample [url removed, login to view])
review it and let me know if what I know is actually possible....
thanks in advance,