I actually forget whether the Dems picked up a Governorship that year.
I know for a fact we got at least one. Tony Knowles was first elected in Alaska that year. Of course, that was a pick up from the Alaskan Independence Party, not the Republicans.
Yes, that was the only Governorship the Dems picked up, Alaska, and as you say it wasn't from the GOP.
The GOP also lost one statehouse in Maine, but again to an independent, Angus King.
No governorship switched from Republican to Democrat, but there was one Dem pickup and one GOP loss.