Everyone here is talking about microcassettes, but the original
question was about tapes made on a GE recorder, and all of
those I've ever seen use the Philips Minicassette format. No
capstan. Rim drive. Effective tape speed increases with the
thickness of the wrap on the takeup spool. I think anyone who
tries to transfer one of those on a Compact Cassette deck is
just trading one problem for another.