If you want to know how to extract the individual layers programmatically from a GeoDatabase-ArcGIS archive, then this is for you. Geo data is often times provided in Geodatabase format. This format provides a container for several layers of data, which then can be rendered using software like ArcGIS or QGIS, which have already plugins to process this file format. But if you work on a lower level, you maybe need to process these files in their format programmatically.