Yes, there is a specific group of people that investigate botting/hacking. Whether or not they are officially titled GM’s or not is irrelevant. There is a human GM staff, working around the clock, and when a botting report is received, it is investigated.
Edit to add: For the record, this is what was said…
In the beginning, the GM staff was the group that handled all interactions and investigations. Since then, they have refined certain categories into different teams. Some GM’s handle account appeals, some work on Billing issues, some work on the forums, some investigate botting, etc.
It might not be technically accurate, but saying “the GM staff” in here is a catch-all for the people who would be getting your report/ticket/etc and looking into it.