GEOgraphic DEVelopers Laboratory is a professional HUB in the field of geographical information systems, in order to provide advanced expert support in the privite and public sector. The main purpose of this geoportal is to supply the geographic community with geospatial datasets from Greece and conform them with international standards according to the Inspire directive. The majority of map data provided, support geolocation and sharing features in order to facilitate the user to find his correct position and download geodata sets easily. The Lab is composed from a college of urban planning professionals, working in the field of geographic information systems, in open source mode. Thus the basic tools for the production of free geodata are Leaflet and Quantum GIS. However for professional projects Grass GIS is used as the main core software. Lab also organizes internships for graduate students in collaboration with University of Sassari (IT) and University of Thessaly (GR).