No I don't have a GRC but I've helped people apply. I've also helped people apply for family visas, indefinite leave to remain, EEA permanent residence, citizenship ... and I've helped loads of people apply for disability benefits and then helped with the almost inevitable mandatory reconsiderations and appeals. I've helped a Windrush client to prove her right to be in the UK. I have a fair insight into the comparative costs and levels of bureaucracy involved in these processes. You don't know you're born. I found your comparison to Windrush particularly disgusting.
How strange that over the past few years of this debate I have never once heard the complaint that the information on the government website is inaccurate. Are GIRES wrong too? And the other trans orgs that produce guidance reiterating what it says on the government site? Why has nobody told them? 
How strange that all the objections to the GRA in Miller's report were to do with the conditions as they are written and there is no mention of the GRP going off piste in the way you describe.
If the GRP are not abiding by the GRA then that is outrageous. Why aren't you out there challenging this instead of wasting your time here having a go at us?