Sounds like your doctor is trans aware. So my guess is that if you circle those items then you will either be sent some literature or be given an opportunity to discuss it with the doctor on your next visit.
Down-side - you are effectively coming out as someone who might have some questions in that area, and of course the questionaire gets seen by whoever you give it too.
Up-Side - well as the doctor is asking the question it is pretty darned certain that the practice are sympathetic to the issue and aware of best practice. So I would EXPECT that all staff will have been told very firmly that their jobs are on the line if they breach patient confidentiality.
So on the whole, if you want to get something to start happening this is probably the golden opportunity, and because it goes to the doctor, you can be sure that it will be taken seriously and not laughed at.