The gmStudio distribution includes a batch script that can be used to run gmStudio from the command line.
You may find a copy of this script in [INSTALLDIR]\support\settings\RunGmStudio.cmd. If you plan to modify the script, use the Settings Form to copy the default version from the settings folder to your project work space.
A productive use of this script is to re-translate your source and deploy the resulting .NET code while you are working on the .NET project for that code in Visual Studio.
This is done by adding gmStudio to the External Tools dialog as shown below. Passing in the $(TargetName) will restrict processing to the current project.