First click your username at the top right of the screen on a groupgets.com page (note that this does not include store.groupgets.com or groupgets.freshdesk.com). 

Then in the drop down select "My Dashboard". 

Next click the "Orders" tab, then click "Show" next to the order. 

On this new page press ctrl+p (windows) or cmd+p (mac) to open up the print window. On the print page you can save as pdf or print it out.