It is a web-based, open source user interface for analyzing and displaying protein identification data.
It was originally designed by Rob Craig and Ron Beavis and first released in 2003.
[1] The interface creates a series of web browser page views of tandem mass spectrometry data that has been assigned to protein sequences.
The underlying data documents are stored in BIOML[2] format files.
Since its original creation, GPM has been under continuous development.