The purpose of this paper is to document the activity carried out by the company AKKA Italia s.r.l. for the project GDT 2.0, included in the program of Galileo Satellite System Management. The GDT project aims to develop and to improve algorithms for monitoring the state of activity of the Galileo system. The GDT is a set of diagnostic “analyses” each of which is composed of several SW modules. Most analyses work with positioning data and all produce data which is exported in .CSV format, HTML reports with tables and figures in .PNG format. Then there is a subset, that are called statistical analyses, where the data exported from the other analyses are used to compute statistical operations.