We are thinking to migrate entire SVN data to GitLab and so many projects and repositories are there in my svn tool but at a time all data how we can migrate.
So please suggest any document and plugin for this migration.
A few years ago I tested svn2git. It worked, but not always. I don’t remember exactly, but there was a problem if you hadn’t the “trunk” branch.
My suggestion: take the latest version(s) of your projects and import them to GitLab, without any history. Keep your SVN server alive in case you’ll need to have a look at some historic version.