Install issue on centos 6

I have not been able to install gitlab on my centos 6 server
I run the and it seems to complete succuessfully
Generating yum cache for gitlab_gitlab-ce…

The repository is setup! You can now install packages.

When I then try to run yum install gitlab-ce, I get the following

gitlab]# yum install gitlab-ce
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile

Can anyone help me resolve this issue please?

Best regards