GORM is the powerful ORM tool that has been developed as part of the Grails web framework. GORM fully leverages the capabilities of Groovy to provide a rich set of capabilities which greatly simplify interacting with databases from any JVM application, not just Groovy and Grails applications as recent versions of GORM are very easy to use independent of Grails.
Jeff Brown, Grails co-founder, has been doing JVM application development for as long as the JVM has existed and has spent most of the last decade focused specifically on work related to the Grails framework.
Jeff co-authored The Definitive Guide To Grails Second Edition, and The Definitive Guide To Grails 2, with Grails founder and OCI Grails Development Lead, Graeme Rocher. Jeff is a regular public speaker on Grails, Groovy and other JVM-related technologies.