I don't know how to characterize wet grip in an absolute way, but I've never had any slip issues, and I find the feel reassuring.

I am, however, too old to die young now, so I don't attack wet corners as aggressively as I used to, but at the same time, I'm neither particularly cautious nor slow, so I feel pretty confident in saying these tires grip well in the wet...at least given my bike setup, my technique, and my prodigious mass.

I'm building up a new dirt road/winter/spring bike next week-- a Kinesis Racelight 4S-- and while I plan to run wide tubeless rims on it very soon, the first build iteration will use some Mavic Ksyrium Equipe wheels I have, and which I plan to wrap in a new set of GravelKings. I'm running GK 23s on my current D/W/S bike, but will probably bump up the volume with GK 28s for the Kinesis wheels. I'm not crazy about running 28s on narrow, 15mm bsw rims, though, so may wind up using their 26s. We'll see soon, but the point is that I like the GKs so much, I'm grabbing a second set. FWIW.