It's quite reasonably priced too (for airport parking), about £80 a week booking for September today. I paid that for short stay parking at Stansted earlier this summer.

I'd be curious how it handles someone parking poorly in that bay e.g. diagonally. Presumably those lines serve as a parking guide and the door won't close unless you park correctly.

I wonder what their secure parking area looks like.

I remember parking in central London where you left your car in a single space inside a building and it would whisk it up onto some unseen location. I think that was under human control but maybe it will make a comeback with automation.

As a general rule, you should take the train to Gatwick if you can, but this is reasonably priced and next time I'm flying from Gatwick I'll probably drive and do this - the train route for me is a bit fiddly, and the worst bit of any London airport for a local is long-stay parking. I'm much closer to Heathrow but the flights from LGW are so much cheaper, it more than covers two weeks of parking at this price.