GMS is a pre- and post-processor for numerical models. Most of these numerical models are run externally in the DOS environment. The default option is to use the Model Wrapper.
The Model Wrapper "wraps" itself around the same DOS executables and gives more model feedback including graphs and tables.
The Model Wrapper includes a toggle box in the bottom left that, when checked and you exit the Model Wrapper, GMS will automatically read in the results of the solution. This toggle will only be checked by default if the model converged.
The option to use the Model Wrapper or the old DOS view is included in the Preferences Dialog. Certain models, including stochastic and inverse modeling, can only be run using the Model Wrapper.
Related Links:
Numerical Models