Can someone give me the current consensus on Howard Gartner/multiple intelligence vs. g, or general intelligence? Is this even something that people still discuss and research in academia, or did the whole field get tainted by accusations of racism and counter accusations of censorship? Gary's claim here rests on an implicit disregard of general intelligence, which seems counter intuitive to me, but it's been a long time since I've looked into it

I don't think his claim is really related to general intelligence as such. What he claims is that the intelligence of the underlying models, general or otherwise, has not advanced as far as is commonly believed. He thinks that the observed improvement is actually attributable to verification tools, so it won't generalize to problem spaces which aren't verifiable enough to build such tools.