GJ doesn't process content bots anywhere so that won't work. Best you can do is to just provide a URL to the login page from the description or just add a module to the overview page (best approach).

Generate an internal Joomla menu link from GJ > Menus for the overview page. Now move that link wherever you like. Now assign modules to that new menu link and they should display and behave like any other module on a menu link does. The module needs to be in a valid module position for your template of course. Again, you can not render the module in the description; you need to render it on the menu link as you would any other module on any other page. GJ does not process content bots.