Grails 2.4 will have Spring 4.0 support. (Spring Boot is based on Spring 4) Of course there already is synergy in that you can reuse components between Grails

Grails 2.4 will have Spring 4.0 support. (Spring Boot is based on Spring 4) Of course there already is synergy in that you can reuse components between Grails and Spring, but things will be getting even better with Spring 4 and Grails 2.4: http://grails.org/Roadmap http://grails.org/Roadmap