I'm not sure what the dividing lines are between a gamma prototype, a release candidate, and a pre-production vehicle -- all terms I have seen applied to Gravities over the past few months.
Lucid published a video of the first release candidate Gravity coming off the production line three months ago. If they are only now at pre-production (whatever that is), I would tend to agree with
@momo3605 that we won't see anything delivered by year end, which is less than six weeks away.
FWIW, a mobile tech came to our house today, and I asked him what he was hearing about the Gravity. He said he has heard that Lucid will deliver a few Gravities by year end just to say they did, but there won't be any significant number of deliveries until Q1. When I asked him the source of that information he was so unsure of its veracity that I didn't even bother to post about it until I saw these last few posts.
Rawlinson said this week that production start was "eminent" (whatever that means). But I have seen nothing reported on this forum or elsewhere that anyone has been contacted to confirm a final order configuration, which I assume would have to happen before production begins unless the first Gravities are going to be delivered to insiders. I ordered within an hour of orders opening up and got a call from my delivery advisor about an hour later, telling me I was one of the first orders they received. (I'm not sure I will confirm my order until I see what impact my wheel choice will have on range, anyway.)