a little better now to see the differences, this livery needs to be updated
• GOL name has been updated.
• Wi-Fi symbol on the belly of the plane.
• Removing the website on the side.
• Add the last two letters of the aircraft registration plate on the tail.
• Another point, the shade of orange in the name GOL is different from the orange of the tail, the right thing would be to be the same shade of color (this on the aircraft that is currently inside the IF)
I researched it too and it looks like the PR-GXZ aircraft is no longer in the fleet and its registration has been canceled.
this model was the first when gol updated its painting in 2015, it has been more than 5 years