Pretty sure the majority of GPUs are used outside of gaming.Yes... and the majority of people won't be using it for things outside of gaming.
Apple does not ignore gaming, iOS is the most successful gaming platform out there. As for AAA gaming, Apple does not ignore that, it just does not yet have a value proposition to offer AAA developers yet. Their desktop and laptops make up under 15% of the market. Very few of those machines are suitable for AAA gaming. Apple‘s transition to Apple Silicon is necessary (but not sufficient) to make any AAA developers port to macOS. The other steps they would need are a new high end AppleTV that is competitive with the PS 3 or 4 and/or Xbox One, and faster GPUs in all their systems including the new iPad Pros and iPad Airs.So why does Apple deliberately ignore such a gigantic market?
With that, they might have a large enough market to interest some (even that is not a guarantee).