Everything was on GeekGadgets, and we are left with a big hole now that that's gone. There's an Irish mirror of the web site still running, but that does not mirror the actual files or the ftp site.
It's hard to believe GeekGadgets just doesn't have a full mirror anywhere.
If you get desperate, drop me a PM with your address and I'll mail you a CD with a copy of the GG ftp site. Hopefully it's not too out of date.
Like I said, the Schatztruhe URL I gave earlier does have it, but I realise the Amiga Unix Compendium is not that cheap if you only want gcc.