after launching GitLab i created an account for everyone who had account in SVN already.
If you already had an account in SVN, check your e-mail. You should have received a mail from GitLab.
This mail might be marked as SPAM/Junk.
Click th attached link and set a password.
When done you are ready to login.
In case you haven't had an account, please ping me on IRC #linuxmce-devel username: ochorocho
To create an account for you i need:
The LinuxMCE GitLab URL is https://git.linuxmce.org/