He has received comprehensive training in acute and general medicine, luminal gastroenterology, hepatology and therapeutic endoscopy.
Professor 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, Professor Gaya performs wireless Bravo pH studies for the investigation of gastro-oesophageal reflux disease.
Professor 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 was appointed Clinical Lead for the GI Research Network for NHS Scotland and is GI Research Lead for the Scottish Society of Gastroenterology. 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.
Professor Gaya is board member of the Scottish IBD charity C³ (www.curecrohnscolitis.org) and an elected Council member of the British Society of Gastroenterology IBD Committee.
Professor Gaya is a member of the Greater Glasgow & Clyde Area Drug & Therapeutics Committee (ADTC) and a gastroenterology advisor to the Scottish Medicines Consortium (SMC) and the National Institute of Clinical Excellence (NICE). In addition to numerous publications and international presentations, Professor Gaya is a peer reviewer for several GI journals, has contributed to several medical textbooks and frequently acts as an expert witness in medico-legal cases.