The Gurnos is an area of Merthyr Tydfil in South Wales, United Kingdom. Merthyr Tydfil today Government The current Borough boundaries date back to 1974 when the former county borough of Merthyr Tydfil expanded slightly to cover The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The chief secondary school in the area is Pen-Y-Dre High School. Pen-Y-Dre is an 11-18 mixed-sex Comprehensive school situated in the town of Merthyr Tydfil, Wales in the UK. Prince Charles Hospital is situated on the estate. Prince Charles Hospital is an NHS district hospital in Merthyr Tydfil, Wales.