Maybe a little bit late for the TO:
I’m currently waiting for my new MacBook - so I used the time to prepare a little Python script to extract the Plugin list of Gig Performer to a CSV and a XLS sheet 
I’m no Python/XML professional, so forgive me for my coding 
GP2csv.txt (1.6 KB)
Just put the attachment to a folder, rename GP2csv.tyt to GP2csv.py, copy your Gig Performer.settings mentioned above to this folder and follow the comments within the script…
Have fun!
BBB