From XMS Wiki - http://wikis.aquaveo.com/xms/
A rich set of step-by-step tutorials has been developed to aid in learning how to use GMS.
The tutorials are in PDF format. They are installed in the "docs" or "tutfiles" directory in the folder where GMS is installed. They can also be accessed by clicking on the links below.
The tutorials are listed below by subject and are not necessarily listed in the suggested order of completion. Some tutorials assume a basic knowledge of GMS and some build on other tutorials. When this is the case the tutorial itself will state which tutorials you should complete beforehand.
Many of the tutorials have files that are needed to run the tutorial. These files can be found in the "tutfiles" folder where GMS was installed. They can also be downloaded here.
NOTE: In GMS 7.1 and up, the default location for the tutorials is the users "Documents" (Windows Vista and 7) or "My Documents" (Windows XP) folder.
Current GMS tutorials are posted here.
For previous versions of the GMS tutorials, click on one of the following links. For the current version, see the tables below.
- GMS 6.5 Tutorials
- GMS 7.0 Tutorials
- GMS 7.1 Tutorials
- GMS 8.0 Tutorials
- GMS:Tutorial Tables 8.1 
- GMS:Tutorial Tables 8.2 
- GMS:Tutorial Tables 8.3 
GMS – Groundwater Modeling System
|Modules:||2D Grid · 2D Mesh · 2D Scatter Point · 3D Grid · 3D Mesh · 3D Scatter Point · Boreholes · GIS · Map · Solid · TINs|
|Models:||ADH · ART3D · FEMWATER · MODAEM · MODFLOW · MODPATH · MT3DMS · PEST · RT3D · SEAM3D · PHT3D · SEAWAT · SEEP2D · T-PROGS · UTCHEM · UTEXAS · ZONEBUDGET|