According to Mehul Sanghvi:
Does GPC work with GCC 2.8.1 or do I still have to use GCC-2.7.2.1 for it ?
At
ftp://agnes.dida.physik.uni-essen.de/gnu-pascal/alpha/
you can find a recent version of GPC that works with gcc-2.8.1 or with EGCS (source and binary distribution).
Hope this helps,
Peter