JAG unit accreditation pathway JAG unit accreditation pathway. GRS, Global Rating Scale; JAG, Joint Advisory Group on Gastrointestinal Endoscopy; KMS, Knowledge Management System; QA, quality assurance. JAG unit accreditation pathway. GRS, Global Rating Scale; JAG, Joint Advisory Group on Gastrointestinal Endoscopy; KMS, Knowledge Management System; QA, quality assurance. Keith Siau et al. Frontline Gastroenterol 2019;10:93-106 Copyright © BMJ Publishing Group Ltd & British Society of Gastroenterology. All rights reserved.