Hey and welcome to the Forum.
If you want to export the models with the attributes, you can do this, but only if you export to .gdb.
To do so, you have to report the attrs in CGA code. Check the tutorials on reporting.
If you want to export the attrs to an other file format such as FBX, it is not possible at the moment other than writing out the metadata to a text file, as described in the Script Based Export Tutorial.
Let me know ..