The keyword Gamgi is used to designate global operations.

In Object->Select dialogs, setting the Scope to Gamgi means that the scope includes all layers and windows currently available.

When the mouse middle button is pressed over some object label, in a window top menu, and then over the Gamgi label in the same menu, the previously selected list of objects of the type chosen with the first mouse click becomes the new current object, indicated by a Object List label shown in the bottom status area.

In xml files, a block <gamgi> ... </gamgi> indicates that everything inside is not object data but configuration data, to be applied everywhere, to current and future objects.