gp2fasta is QT application converting gp files from NCBI GenPept format to fasta. Its main purpose is to create fasta files with short, but still accurate headers for sequence.

For example:
>Strpur-115729834-h
PNQILMQFRLDDNGSSYYKELASIIYGASPEFELAIFTVCFKENPNALSTFTMAGGITQKVQTWDYNGGYIGSAYFSV

stands for:
gi: 115729834
organism: Strongylocentrotus purpuratus
additional information: h (hypothetical protein)
sequence:PNQILMQFRLDDNGSSYYKELASIIYGASPEFELAIFTVCFKENPNALSTFTMAGGITQKVQTWDYNGGYIGSAYFSV

Additionally, example input file was added.