For example your data scientist can't now look at the raw data and decide to feed it into some new machine learning process to identify fraudulent transactions if when the data was collected explicit consent wasn't obtained to do that.
Technical people now need to understand what data is 'protected' by GDPR and what consents have been given for the processing of that data. And that for example linking an IP address to a piece of data can suddenly transform it into personal data now protected by GDPR.
With internal audit you're generally overseeing the compliance folks (from a distance), as a compliance person you're more often implementing the technology yourself. Another role to look into is risk management. All of them are a small step back from "hard" IT like sysadmin or programming and getting more into the people and process side of the IT house.
Highly recommend the move for anyone who doesn’t want to be on call or carry a pager anymore.
But with regards to your point about having a law degree - I'm not sure where you're based but a qualified solicitor with a specialism in cyber law and data protection here in the UK will be set for a while. The GDPR enforcement date is a cash cow for consultants, but for lawyers this is just the beginning.
Edit: After seeing what freehunter posted at the same time as me - If you don't want to go through the hassle of becoming a qualified solicitor, then compliance is definitely a way to go. GDPR sets out a requirement for organisations to employ 'Data Protection Officers' so if compliance/risk management is of interest to you then the compliance ladder is pretty solid.
It's not just GDPR, but lots of other EU regulations this year that are having large impacts on tech systems (e.g. in the financial world), and being across those is valuable.
Perhaps you won't get your hands dirty on actual code, but technical implementation of regulation is a lucrative field (or, at least, this phase of "oh shit we need to do something" is).
Banks, especially, are inundated with regulations (high-level, abstract) that necessitate technical (low-level, concrete) implementations or adaptations. Often, there are great legal minds at work on the one side, and great technical minds on the other side, with a large gap and significant barriers communication in between.
Being proficient in both of these matters can enable one to bridge that gap.
European banks are scrambling to patch software to purge older records. Backup strategies have to be changed to accommodate this as well.