Hi Jeatyn,
Seeing your GP is just the start of the process, which will eventually lead to refferals for hormones and surgery. Your GP cannot prescribe hormones without specialist approval.
First thing for you is honesty, the truth and to tell him / her about your feelings and what you wish to do. They can then get you some evaluation, normally by the PCT Physchiatrist before refferal to a GIC. Beware that many PCT's use Charring Cross for thier GID work and others such as Sheffield, Leicester have long waiting lists.
My GP when I saw him had never treated a TS patient, but I took him (and the practice partners) lots of literaure, including a document called "A GP's guide to transsexualism".
I had a great relationship with my GP and for me he gave me a refferal letter, worked with my specialist Physchiatrist from Leicester, organised speech therapy, wrote prescriptions for hormones on approval from the GIC, organised and monitored blood hormone levels, provided me with Surgery refferal letters and completed my GRP application to change my birth certificate.
They are only General Practitioners and sometimes you have to lead them by the hand to point them in the right direction, never be afraid to do that.
Rebecca