To ensure design intent and accuracy, it's always advisable to spend some time checking over your Gerber data before sending to your manufacturer.
Although Pulsonix can itself read Gerber data, there are benefits to using a third party tool to check the files exported from Pulsonix.
There are various viewers around that you can download, but one which was announced yesterday is the online Gerber viewer from Ucamco - the company that owns the Gerber format. Just sign up on the web page, then you can drag-and-drop Gerber files onto the browser for a quick visual inspection.