He has received comprehensive training in acute and general medicine, luminal gastroenterology, hepatology and therapeutic endoscopy.
Dr Gaya has a major interest in diagnostic and therapeutic upper and lower GI endoscopy. He is a certified colonoscopy trainer and undertakes therapeutic colonoscopy as part of the National Bowel Cancer Screening Programme. Also, Dr Gaya performs wireless Bravo pH studies for the investigation of gastro-oesophageal reflux disease.
Dr Gaya's sub-specialist interest is inflammatory bowel disease (IBD) and is the recipient of a research fellowship from the Chief Scientist Office (CSO) of the Scottish Government to undertake a comprehensive IBD research programme in the West of Scotland. He receives tertiary referrals for the management of complex cases and set up the transition clinic for adolescents with IBD with colleagues at the Royal Hospital for Children in Glasgow.
Dr Gaya is board member of the Scottish IBD charity C³ (www.curecrohnscolitis.org) and the secretary of the British Society of Gastroenterology IBD Committee.
Dr Gaya is a member of the Greater Glasgow & Clyde Area Drug & Therapeutics Committtee (ADTC) and a gastroenterology advisor to the Scottish Medicines Consortium (SMC). In addition to numerous publications and international presentations, Dr Gaya is on the editorial board of the World Journal of Gastroenterology, has contributed to several medical textbooks and frequently acts as an expert witness in medico-legal cases.