Yes, it is possible to collect repositories from multiple private GitLab repos in Tabby. To connect to private GitLab repositories, you need to create a deploy token and use it in the git_url field of the config.toml file. Here is an example:

[[repositories]]
name = "your_project"
git_url = "https://$deploy_token:your-gitlab.com/repo/project"

In the future, there will be easier integration by connecting directly to the GitHub/GitLab instance.