I've seen that if the routes into UrlMappings are writen with single quote the method createLink doesn't work correctly. I endose an example: //UrlMappings "/service" { controller = 'serviceController' action = 'show' } //gsp <a href="{createLink(controller: 'serviceController', action: 'show')}">...</a> this gsp code generates: <a href="/serviceController/show">...</a> but it should generates: <a href="/service">...</a> If I change the single quotes into the UrlMappings file it works fine.