I don't think that was the intent of the comment, more that true AGI should be so useful and transformative that it unlocks enough value and efficiencies to boost GDP. Much like the Industrial Revolution or harnessing electricity, instead of a fancy chatbot.
Not equivalent, but I do think a necessary byproduct of actual AGI is that it will be able to solve actual problems in the real world in a way that generates positive value on a large enough scale that it will show up in GDP
