I have been tinkering a bit and have basic parser for pfSense syslog events to enrich your SmartCenter with yet another gateway.
It's rather basic at the moment but so far it parses 100% of the events I had over 2 days. (And that is a box in front of a honeypot.)
addParsingFile -p pfSense.C -d pfSense_dict.ini
Feel free to test it yourself.