A concept of the transnational geological GIS creation consists in the consideration of spatial objects under study as an integrated complex system with its specific internal structure and cause-and-effect relations between its separate units. GIS application is a tool of systems approach, means of reality imaging when the real object or a group of objects is studied via specially developed model which reproduces attributes and characteristics of the original and a process. In this case, GIS data are founded on a common geological concept; geological objects are described by the interrelated features on the basis of common geological classifications; digital maps have a same topographic geographical background and legends concordant between each other and etc. GIS-technology for the creation of transnational geological GIS is based on the suggested concept and consists of following successive stages: design of a system formalization of geological objects and their interrelations is the controlling factor in this stage; selection of hard- and software for realization of GIS-technology; creation of a topographic background map; formation of digital maps and attribute databases in a GIS-environment; organization of a maximal interrelation between digital maps and databases for solving the information retrieval problems; development of a user-friendly interface. The suggested concept and GIS-technology has been successfully applied for the creation of GIS ``Mineral Resources, Metallogenesis and Tectonics of North-East Asia''. The system stores, processes, displays, disperse, and accesses cartographic and attribute information about geological objects of Eastern and Southern Siberia, South of the Russian Far East, Mongolia, North-East China, Korea, and Japan.