No, you can't override UIUserInfoPortlet.gtmpl, this template is not designed for extension, but you can override this file https://github.com/gatein/gatein-portal/blob/3.2.0-GA/web/portal/src/main/webapp/WEB-INF/conf/portal/portal/sharedlayout.xml --> this file allow you to control the which portlets should be on the taskbar menu, so you can remove the section that refer to UserInfoPortlet by your own portlet