Is it possible to track, e.g pageviews, time on site etc., only those visitors who come from a particular entry page, eg.
http://www.abc.com/123?qwe=456 to my site using Google Analytics. If yes, then how.
Within Google Analytics, select 'Behaviour' in the left hand menu.
Then navigate to 'Site Content' > 'Landing Pages'.
Select the landing page in question, and this will detail those metrics you specify for only visitors to your website via the selected landing page.
If you want these visitors broken down further still, just select a secondary dimension at the top of the table.
I would certainly suggest playing around there as it sounds like this would achieve what you're after.