Doesn’t that say that Apple has to give you access to your photos in a format where you could then upload the photos/videos to Google? It doesn’t say that Apple has to perform the transfer for you. That’s the novelty here — Apple handling the transfer on their side without any user intervention.
Given the country list, this is being done to likely get ahead of some kind of regulation, but I don’t think this is necessarily due to this specific clause. This is above and beyond what would be minimally required.
But from other comments, it looks like this is the start of other data transfer initiatives between major tech companies. Which would be a good thing, even if it is a result of trying to avoid further regulation.
It wouldn't be under that specific clause, but GDPR gets attached to many situations because people don't have a clear understanding of what it is and the limitations. If you work for a global company you'll find GDPR attached all kinds of customer requests to get extra traction.