Obviously you are getting bad info. Flashprint is made by Flashforge for ALL of their printers. It comes with the Flashforge Creator Pro. I have used it and it is fine.

As far as the gcode, you have been converting it to X3g with an outdated piece of software that is known to have issues with more complex models. On top of that it appeared you are using the non sailfish version of RepG, more issues. But ok - do as you wish. Good luck.