Thanks for the prompt reply. Well, the FTF list was public, the other not. However, switching the others to public does not help to show them in PGC. Also some of them were shared, but not the FTF list, so this sould not matter.
PS: in any case - the bookmark-List feature in GC.com is not great, so once the Virtual GPS can feed back into PQs (via bookmark lists) I don't need them any more. However, with the iPhone app there is not alternative at the moment.