Is it possible to apply a set force on a vehicle towards a given coordinate? I'm messing about and wanted to do a quirky level with some gravity direction changes.
https://www.beamng.com/threads/soon-to-a-planet-near-you.58240/ Judging by this thread it looks like what you want "should" be totally doable. I am not a map builder though so I am not sure exactly what would be needed for you to accomplish this feat.
Silver Valley map uses gravity lua triggers I'm pretty sure Atlanto map also used gravity before but now that I checked it uses wind, which seems to be easier to direct. This answers the localized wind question discussed recently https://www.beamng.com/threads/environmental-damage-factors-lava-melting-jbeams.82012/
I'm sure you'll get it done. I was able to re-create the Atlanto gravity box in one map with the old editor. The idea was to make a sticky mud pit with it. Extra gravity made it very sticky indeed but of course it looked so stupid the idea had to be scrapped .
I've got a beammp gamemode that involves one of the arenas having reversed gravity and I'm working on making some more crazy stuff involving gravity so I may be able to help you along the way