gemnasium-gitlab-service 0.2.5 isn't compatible with ruby 2.0
Created by: anthonyryan1
The Gemfile specifies that any 0.2 version is acceptable, but the upstream released 0.2.5 without compatibility for ruby 2.0. Since this hit bundler it's now failing to allow gitlab to run on ruby 2.0.
I would propose locking the Gemfile to a known good 0.2.x version until the upstream resolves their issue.