Pierleoni A, Martelli PL, Casadio R. PredGPI: a GPI-anchor predictor. BMC Bioinformatics. 2008 Sep 23;9:392.
Before running predgpi you need to set and export a variable named PREDGPI_HOME to point to the program installation dir:
$ export PREDGPI_HOME='/path/to/predgpi'
To run the program:
./predgpi.py -f FASTA -o OUTF -m {json|gff3}