Fence Gate models textures do not rotate correctly when opening and closing gates.
They are also not consistent when placed in each direction.
This effects all six different type of wood and when place next to a Fence or a Wall.
Method to reproduce:-
Place a Fence Gate in the East direction and place a Fence Gate in the West direction, you will notice the textures are not the same.
Place a Fence Gate in the South direction and place a Fence Gate in the North direction, you will notice the textures are not the same.
I tried setting the UV lock to false and it makes no difference.
I've also attach an image using the debug texture as it's easier to see and a one texture resource pack with the debug texture set for Oak Planks.
The texture has the same orientation on the back as it has on the front, this is working as intended.