Have the GK 700x38s on my gravel bike. At mile 4 of 40 on a mixed 50/50 gravel/pavement ride last weekend I picked up the 3/4 inch screw you see below. The sealant sealed the puncture with the big screw in it. When I pulled it out it spewed sealant, I spun the tire and it pretty much sealed up. I plugged it for good measure considering I had a lot of miles left to go. I don't see any reason to replace the tire - the plug seems solid. I've ridden GK 32's on my cross bike for several years and had no particular issues with flats or cuts.
