The tool chk4upd checks if there is a newer version of GAMS available than the one you are running. It checks for the most recent version available as well as for the newest version you can run with your license in case your maintenance and support is expired.

By default it reads gamslice.txt located in a GAMS standard location. Alternatively, you can specify another license on the command line. In addition to the command line tool you will find an integration in GAMS Studio and the GAMS IDE in the Help menu.