The App Engine GORM plugin work with App Engine Plugin and GORM JPA plugin to allow Grails application running in Google App Engine(GAE) perform batch insert, update and delete operation. Given request time limit (30 seconds approximately) from GAE, support of these batch operations is critical for any serious Grails application running in GAE such as application that required massive data input from complex form, import data by file upload and bulk loading data to data store(BigTable).