On May 30th until June 1st, 2018, EPOS TCS GNSS Data and Products participated to the EUREF 2018 Symposium, which was hosted in Amsterdam, Netherlands. GNSS Metadata Management and Distribution System (M3G) was a poster by A. Fabian, C. Bruyninx, J. Legrand presenting the new metadata management and distribution system for multiple GNSS networks that is used in EPOS and to which the EPN is presently migrating.