I install 2 script, guestbook and Gallery2, they all need GD or Imagemagic, but the scipt can't call.
The support team tell me the GD had install already.
I install the same script in sever112 and in the other company server, server112's GD can't work, the other one work fine. So I guess maybe it's server configure probleum.
Here are test link. One can show small size image, the other can't.
Server112
Work fine server
The guestbook script download
Gallery2 Download(2.0.1)