We used to have the same problem with GP and surgery not discussing hubby's stuff with me. Our GP told us to write a letter, stating that hubby gave them consent to discuss all his medical things with me/test results/problems/medication everything. We both signed it AND we've done one for me too. Technically hubby can't 'sign' anything, but they turn a blind eye to that and understand totally what we're on about and so does the GP.
If I ring for results and the receptionist says, that she can't discuss hubby's results with me - I just say, oh yes you can, just look at the notes. And then they apologise and say that 'oh yes, that's fine'.
These 'letters' have been put on the computer files at the surgery and now, when I ring about results etc, which you normally have to make a GP appointment for, they tell me instead. We always have to go into the GP surgery together, when hubby has a problem, cos he can't get in by himself and the GPs never have had a problem with that.
It's the hypocratic oath not to discuss a patient's problems, but there isn't a problem with doing so, if the patient agrees for things to be shared ie the letter we wrote.
Don't know if there's a way around your situation, just saying that by writing this letter, with everyone's consent, it's been much better. And it doesn't drop your GP or the receptionists in the cart either, for discussing confidential information.