I too, have an interest in late WWII swords. I don't currently have any gunto, but I do have a couple of gendaito. You can read about one of them, made in February of 1945 by Tsutsui Kiyokane, here. The sword has the most umegane of any blade I've ever seen; and as I read through my old post, I erred when I wrote "There is some evidence in the hada suggesting the possibility of bigger issues requiring umegane.." Don't know how I missed that the first time round, because there is nothing that even hints at the reason for the umegane. I've always wondered if maybe the metal had some special meaning to the smith that he wanted to incorporate into the blade.
My other one is a blade by Shibata Ka; made in August 1945. I don't recall seeing one any later than that, and Ka passed before sword making resumed; so I've often wondered if it was the last blade he ever made.
Edit: Just FYI, There are at least two swords from 1945 on Ray Singer's website; a Takenori and a Akitaka