Welcome to the ScriptBasic forum.
If you want to reference extensions modules from your scripts, (using IMPORT or INCLUDE) you should have a configuration file defined that at least points to the module and include directories. Keep in mind that the configuration file needs to compiled with the scriba -k <text version of config file>. If no pre-existing config is found in the bin directory, ScriptBasic will generate it in the C:\WINDOWS directory. Using the scriba -d <your script> will show the loading process and success of extension modules you may be using in your scripts.
GTK-Server is a great way to add a GUI to your ScriptBasic scripts.
Let us know if you need any help getting up to speed with SB.