Have a look at the Help for the *GET command, specifically the
Table 169: *GET Postprocessing Items, Entity = PATH
I have never tried this, but obviously it is possibile to loop through all the points of the PATH and extract coordinate information. I would write this out to a .txt file, with APDL commands. You ask for an ARRAY in WB, I don't know the answer to this part of the question.
Hope this helps
Best regards
Claudio