Maybe you got a buggy download. I see that there are no checksums provided on that page.
Run md5sum on it and see if you get the same result as me, if either of us had errors in downloading the checksums should be different. My theory is that we would have different errors, if any. So if they're the same, it's likely not a problem with the iso.
[kurt@Heimdal ~]$ md5sum g4l-v0.34.iso
---------- Post added at 07:40 AM CDT ---------- Previous post was at 07:04 AM CDT ----------
Hey, I seem to have a buggy (or incomplete) download myself. Wget reported it as complete, but there's a .part file in there too, so I re-download it later this morning and run md5sum on it.
They should provide the correct checksums on that page.