Yes, this is what the z390 portion of Gigabyte's website shows (and thanks for putting it here). What I cannot figure out is whether there are z370-compatible procs. that will also run on a z390 mobo.
8th gen CPUs will run on a Z390 motherboard, and 9th gen CPUs will run on a Z370 board after a BIOS update is applied. If you want to buy say an 8700k and run it on a Z390 board, you should be able to do it.