You mean like drag&drop an Audio from a script-gui-window into the project?
Should be possible, as you can find out, if the mouse left the gui-window+use
BR_GetMouseCursorContext:
https://mespotin.uber.space/Ultrasch...eCursorContext
and
BR_GetMouseCursorContext_Position:
https://mespotin.uber.space/Ultrasch...ntext_Position
to know, where the mouse is currently placed.
If gfx.mousecap signals, that the left-mousebutton has been lifted, you insert the audio at that position.
The other way round, Item drag&drop into gfx-window is more difficult, cause if you leave the arrangeview to drop an item into a docked gfx-window, the arrangeview might scroll into that direction, as well as moving around the item.
Would need somehow blocking the mouse-messages sent to arrangeview using Julian's extension.