Two commands are available in the pulldown menu.

Add GAD Objects from File allows you to combine the current structure with objects stored in another .gad file. This command is not available from the GAD Objects’ context menu

Import GAD Objects from File allows you to import objects stored in a .gad file into a modified domain. The same effect might be achieved by loading the .gad file and then using the Edit Domain command afterwards. This command was available through the ImportGeo-Base module in GeoDict versions 2023 or earlier.