Your here link is broken, so it is hard to know exactly why Gambit is not working with your code.

Concerning the automatic installation of modules feature, please note that it only does that from trusted sources (whitelist) and initially the whitelist only contains github.com/gambit which is the github account that hosts the Gambit source code. Note that there are several ways to disable this feature: at "configure" time with --enable-module-whitelist=, or with the environment setting export GAMBOPT=whitelist=, or the runtime options -:whitelist=, or programmatically with (module-whitelist-reset!).