The HGPS survey was a decade-long observation program carried out by the H.E.S.S. I array of Cherenkov telescopes in Namibia from 2004 to 2013. The survey covers the Galactic plane at longitudes l from 250° to 65° and latitudes |b|<3°. The angular resolution is 0.08° (~5 arcmin) and the energy range between 0.2 and 100 TeV.