IBM GBS Application Developer Work

Hi, I am currently interviewing for Application dev-Frontend role in IBM Hyderabad. I am considered for their GBS business unit, I got to know from Quora that GBS is a service unit, so I want to know what kind of work is there. I have three years of work experience in product based company. If anyone working in IBM Hyderabad in GBS business unit could answer, it would be great.