The upcoming Debian GNU/Linux 2.1 version includes a gpc package based on 19990118. Currently it's available from the Debian ftp archive and it's mirrors (look for gpc-2.91.60-4 or newer). Currently it's available for i386 only, packages for m68k, alpha, sparc and arm are expected next week on the archives.

For more information please see http://www.debian.org/