8.3.5 Mapping to Views
You can resolve a URL to a view without a controller or action involved. For example to map the root URL / to a GSP at the location grails-app/views/index.gsp you could use:
static mappings = {"/"(view: "/index") // map the root URL}
Alternatively if you need a view that is specific to a given controller you could use:
static mappings = {"/help"(controller: "site", view: "help") // to a view for a controller}