You should be able to save global library and when you save it should prompt you about message like -
"Global library is about to be overridden" with choice to OK or Cancel button.
Once saved changes should be reflected in all other scripts where its referenced.
I don't think there is any direct option as of now where you can link ALM resources in the scripts but good to check with HP support if there is any way to achieve this.
Tnx!