There are a variety of way in which you can do that. You can group menu item in Gantry 5 menu editor and use multiple columns, or you can make a particle or module a child of the parent menu item and then in that add another menu particle or joomla menu module, or even your own customhtml module with all those links.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.