the repository description (GitLab 7.7+)
the Git repository data (GitLab 7.7+)
the issues (GitLab 7.7+)
the pull requests (GitLab 8.4+)
the wiki pages (GitLab 8.4+)
the milestones (GitLab 8.7+)
the labels (GitLab 8.7+)
the release note descriptions (GitLab 8.12+)
the references to pull requests and issues are preserved (GitLab 8.7+)
https://docs.gitlab.com/ce/workflow/importing/import_project...
