Speedbird,
Unless you're a likely candidate for the starring role in 'Cyclops - The Movie', start gasping for breath after pushing open the door to the medical centre or have actually been dead for the past two months without realising it, it is highly unlikely the CAA will contact your GP, unless you disclose something highly dodgy on your application form which requires further investigation.
I have had serious spinal surgery but I took the surgical reports with me and it didn't prevent me being issued on the spot.
All things being even, you will be issued with your Class 1 Medical there and then on the day.
Good luck & remember to pop your glass eye in, screw your wooden leg on and slip a glove over your hook.
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