There is no single answer to this question, as it depends on the specific Maven repository you want to add, as well as your Google account setup. However, in general, you can add a Maven repository to Google by following these steps:
1. Find the Maven repository you want to add. This can be done by searching online, or asking other developers for recommendations.
2. Once you have found the repository, add it to your Google account by following the instructions on the repository website.
3. After the repository has been added to your account, you can access it by going to the Google Maven Repository page and selecting the repository from the list.