In Watson Studio -> Go to -> 'Profile and Settings'
Go to -> 'Integrations' Tab
Click on -> personal access tokens
Enter -> Your Github Password
Fill -> Note
Choose -> repo
Press -> 'Generate token' Button
Copy -> Personal access tokens
Return to GitHub Integration & Paste -> Personal access tokens
Press Save Button
Now Go to Project -> Settings -> Integrations -> Type Repository URL -> Update
Now Go to Asset tab -> find the notebook you want to publish -> press ⋮ -> You can publish as gist or Publish on GitHub