GPs on Curzon - Caring for our Community. In late 2014, GPs on Curzon undertook a series of changes and was purchased by Dr Rachael Gray and Dr Diana Sampson. GPs on Curzon is still a privately owned, full service medical practice in the Medici Medical Centre on Curzon Street, East Toowoomba. Owned and operated by doctors, we offer patients a more personal approach to their health needs. Both Dr Rachael Gray and Dr Diana Sampson work as a General Practitioner at the medical centre, along with a team of other professionals. Our medical practice consists of a friendly and skilled team of doctors, nurses and other health care professionals, all working together to achieve quality patient care. We now have full online booking facilities making it even easier for you to book your next appointment