2D Grid Module
The 2D Grid module is used for creating and editing two-dimensional Cartesian grids. 2D grids are primarily used for surface visualization and contouring. This is accomplished by interpolating to the grid. The figure below is an example of interpolating contaminant concentration data to a 2D grid.

Concentration Data Interpolated to a 2D Grid
Watertable Elevations From a MODFLOW Simulation
For more detailed information on the 2D Grid Module options in GMS visit the following GMS wiki links:
www.xmswiki.com/...2DGridModule
www.xmswiki.com/...2DGridTypes
www.xmswiki.com/...CreatingandEditing2DGrids
www.xmswiki.com/...Converting2DGrids
www.xmswiki.com/...2DGridDisplayOptions
www.xmswiki.com/...2DGridToolPalette
www.xmswiki.com/...CellProperties