To my knowledge they were the same as the 1's, 2 short skirts, 1 on each side of the ball tray. 1 solid piece on the head rail blinds, and 1 left & 1 right for each long rail blind. I have however seen the short corners only too, but that was because someone cut them down in length.
There is a document on the internet that shows color photos of the GC variants from the I to the IV. In the GCII photo, the 'winglet skirts' are clearly shown and also described in a small write-up column astride the photo. Whether the document is original Brunswick is an open question although it appears genuine with accurate, comparative descriptions of the other models.
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