I would not recommend interviewing for GLG in Dublin. I had absolutely the worst interview experience there.
During the onsite interview, I spoke with 3 people - 2 of them were very nice and supportive, seemed like they genuinely were interested in working with me. The 3rd person was a completely different type of person. For every question that I answered, he said "Actually, it's wrong", and then said the same things as I did only with different words. He also specifically asked me over 5 times why I am not interviewing for a company X (a very well known company in Dublin and in general as well), seemed like he wanted to hear "Oh yes, I am interviewing there". He also asked personal questions, that were family/friends/personal life related, which is extremely unprofessional.
Overall, I am very happy that I was rejected because working in such environment is the last thing that I want to do.