The Google Apps Script GitHub Assistant is a free script-driven web app that lets you manage your code. It supports GitHub, BitBucket, GitLab, and Google Code. 

You can use this tool to manage, execute, and view your code on any of your computers. No matter if you are a beginner, a professional, or an expert, you can rely on this app to execute, view, and edit your code anytime, anywhere.

The process of using the tool starts with connecting it to a GitHub, BitBucket, or GitLab account. This is done by entering the information into the device's web browser and choosing which account to connect to.

Next, you need to enter the URL of the project you wish to manage. You can enter a URL with or without a path.

The app can then display the files and folders associated with the project. You can edit them by simply entering a new value. You can also view the source code by clicking on the Source code tab.

You can also run the code that you have in your project. To do this, select Run. This will then launch the selected project in the web browser. You can run the code on your local computer or on any of the remote machines you have connected to your GitHub, BitBucket, or GitLab account.