CentOS / RHEL 6 64 bits

Installation instructions

sudo wget -O /etc/yum.repos.d/gitlabhq.repo \
  https://dl.packager.io/srv/gitlabhq/gitlabhq/7-6-stable/installer/el/6.repo
sudo yum install gitlab-ce

More details can be found at https://github.com/gitlabhq/gitlab-recipes/tree/master/install/pkgr .