Hey there, went up over the weekend and there is no longer a gate that I could see on the road.
In fact, I know you put North of the cemetery for the turn, but just for clarification you may want to add that it is exactly 1.25 miles from the 4th Ave W turnoff Main street to the turn and the turn comes BEFORE the cemetery. It is not the obvious route to take as google maps tries to take you up past the cemetery up that stretch of Thunder Mountain Road.
The green gate was just a bit off of the main road. A pic of the gate:
If that gate is gone, then yes, it would make sense to add that news to the getting there instructions. Thanks for taking the time to share what you found. I'll add that to the directions. There was a lot of private development going on when I was there so things may have been changed.