The best resource for learning Google Script is the official documentation available at developers.google.com. Here are other places that will help you get up to speed.
- Google Apps Scripts - Snippets by +Amit Agarwal
- Apps Script Starter - Modern development workflow for building Google Apps Script projects with Babel, Webpack and VS Code.
- Digital Inspiration by +Amit Agarwal - Google Addons
- Awesome Google Scripts by +Amit Agarwal
- O'Reilly - Apps Script - by +James Ferreira
- Apps Script Webinars - YouTube - by +Eric Koleda
- scriptsexamples - by +James Ferreira +Romain Vialard
- appsscripttutorial - by +Waqar Ahmad
- StackOverflow Q&A - Got a question? Ask here.
- lynda.com - Scott Simpson (Up and Running with Google Scripts)
- Tutorial - Written Google Docs Addons
- Known Issues & Bugs - Report a bug here.
- scoop.it/t/gas by +Martin Hawksey
- Case Studies - Sample Google Script Projects (google.com)
This list is maintained by Amit Agarwal of Digital Inspiration. Send me a tweet @labnol to suggest another resource.