I highly doubt any G-code would be freely available let alone legal on the basis of intellectual property. However any that is would likely be a negative of the actual part. It is likely that the corresponding 5-axis mill would produce an aluminum negative and the CFRP laid in it would be then produced as a positive. If you want G-Code I'm sure there are some freely available models here, open them in SolidWorks/Inventor or software of your choice and use a CAM package like Gibbs or whatever to transfer the geometry and generate your G-Code.
Also, this is my first post and this place seems like somewhere where I'll spend too much time.