Basically there was a period on HN where every other post was about stupid hiring practices and how absurd some code interviews were. Well Gitlab embodied all of them.
They phone interview quizzed me on several "gotcha" questions, and finally I was asked to describe Prototypical inheritance (JS), in which I was knowledgeable about and gave a very detailed and technical answer, in my own words (so not some memorized wikipedia answer), and basically what I got back from the recruiter was in essence, "Nope that's not what this piece of paper I have in front of me says the answer is" that is that although I had answered the question technically correctly, it wasn't the type of answer they were looking for.
Anyways, not salty about it anymore because it seems like I dodged a real bullet.
I am Liam a Recruiting Lead for Gitlab. I would be very keen to set up a time to talk through your interview experience.