I have found my GP not interested in lchf; they haven't studied it and therefore are unable to advise either way. My consultant however has much more experience of it, and actively encourages it as he can see the huge benefits it has had for both me and other patients.
My DSN's whilst also not taught it, are seeing more and more people with D turning to lchf with overall fantastic results - however, as with anything in life, it's not something that works for everyone.