Quite.
Note also, that (ArM5 p.105):
Familiars learn Abilities in the same way as humans. They cannot, however, learn magic, ...
So (with RoP:TI p.124) binding a verrry rare still Gifted spirit as a familiar would at best freeze that spirit's magic forever. Why would that spirit consent to it, if it still has the Gift enabling it to learn much more? Why would a maga admiring the spirit do that to it? Shouldn't she have tried to make it a covenant member instead?
AFAICS the SG got that Goetic maga painted into a corner with an extremely unlikely familiar, and needs to get her out there on their own. Reading rules on a forum does not help here. The SG just needs to understand the maga and her situation in depth and act accordingly, likely resorting to house rules.
Anyway, as a familiar even if Gifted cannot learn magic, it should not be able to learn the Parma Magica ritual either - or should it?