Thanks ispyridis, I've had a go but there's something odd.
As soon as I select the 'Drawing Title' subtype, I seem to no longer be able to place the object as a normal GSM file. It doesn't throw up any errors in the scripting area, but it doesn't appear alongside the others in the object selection area.
I've tested with a blank object (New Object, then Save As) and it works fine for, say, 'Drawing Symbol', but the moment I change it to 'Title', it no longer appears.
If I try to pick it directly through the 'Load Other Object' settings, then I get an error saying 'The selected file is not a General GDL Object file. Please select a valid General GDL Object file.'
Are Drawing Title objects used / placed differently?