GENIUS is designed to boost the impact of the next European breakthrough in astrophysics, the Gaia astrometric mission. Gaia is an ESA Cornerstone mission scheduled for launch in October 2013 and aims at producing the most accurate andcomplete 3D map of the Milky Way to date. A pan-European consortium named DPAC is working on the implementation of the Gaia data processing, of which the final resul ...