I'm confused, but that's nothing new.
The thread says Gull Wing Doors. Which I assumed it meant the doors, not changing a window into a door.
Gull Wing Door for people are not useful on a 4 door truck. They were design for small 2 door cars where space was limited and the overhead room for entry is useful.
Now if we are talking about the rear side window, eh why? If you are sleeping back there and need to crack a window, there are existing 5 windows. 6 if you have the moon roof. I'm not sure what some extra holes would do?
You could always add one of these if really want some air flow.