Interesting. Had no idea that Fritzing could even do PCB gerbers. (I'd only played with it once for a few minutes to see how someone else made some pretty wiring diagrams.)
It's not very good at it, and I wouldn't recommend it over more capable options like Kicad, but if all you need is a simple 2-layer PCB to connect a few basic components together, it'll get the job done. The results won't win any design awards, but they'll work.