To export Grids stored in g-Space navigate to 3D Grids in Data manager, locate Grid you want to export
Right-click on the Grid, and there is an option to export the grid to Eclipse format
The export process will generate:
•A .dat file containing general grid information and property data.
•A .GRDECL file storing grid coordinates and structure.
For more information about maps formats supported by g-Space refer to Grid Data Formats