it's difficult to find that specific information in English (I believe). There's something in German if you try for instance Google and search for "gottschee flucht weltkrieg cilli". Unfortunately what you'll find is to some extent not fully trustworthy. Part of it sounds revanchistic - at least for me.
This one sounds more reliable, not too much biased (German): http://www.gottschee.de/Dateien/Erlebnisberichte/Web%20Deuts...
Gottschee language & culture (German):http://www.gottschee.com/
History and general information:http://hwk.best.vwh.net/ks/gottschee.html
Mixed Gottschee links:http://www.reliantdrive.com/gottschee.htm
See more here:http://www.google.com/search?hl=de&q=gottschee&btnG=...