Gender: boy
I was led to the crarg.org website where I then searched for C. Galster. It came up with a result, saying he was found in the Poland: Register of Jewish Surviors II (Jewish Agency, 1945) {H}. In this area, I was able to find his "-sort", which is 25566. His digital file id is 09/DSC00032.JPG, and can be found on page 82.