The libraries used for import/export are only compiled for Windows x64. This add-on will not currently work on other OSes. Files > Import > PSO2 Model Search opens a window to find an import items by ...

import-G-code Imports G-code files into Blender 2.80+ as a collection of layers which can then be animated or exported.

Around 1% of your Orens will also carry over from the save file, so that you start with those extra funds in addition to the 150 orens typically available to you once you start playing The Witcher 2.