Whereas existing Plug-in products save spatial data and property data separately, GMS saves them physically together, therefore providing speediness in map search and spatial query. Features of diverse spatial queries and prompt operating speed make GMS the most suitable product for GIS database system. Existing Plug-in products are composed of products that have common DBMS and Middleware and can cause additional costs as well as difficulties of having to manage common DBMS and Middleware separately. However, GMS provides every feature in DBMS itself, therefore is readily manageable in both saving and managing. GMS can get away with the dependency on specific software that possesses a considerate part in the GIS market, and as a pure home- made product, is accessible to future repairs and technology support.