Sept Update:
There has been a fair amount of progress on the GTR gauges.
The hardware has been finalized and I now have 20 circuit boards back from manufacturing. Over the next week I'll be building a few kits and start to test locally. (Toronto)
The hand wired prototype has worked perfectly in testing on my G37 and good progress has been made in getting kits made
Want Live Tire Pressures on the Nav screen?
If your 2010+ 370 has navigation and a USB port, this video will show you how to enable the "Tire Pressure" menu, using any USB A to A cable. (about $8 from Amazon)
As far as I know, there isn't any way to get this to work on 2009 and older navigation units, or any 370z without navigation.
The 370, G37, GTR and about 8 other models all use the same navigation system, known as the "08IT". To get different functionality from the same nav unit, the configuration is changed.
This configuration controls if you have AUX IN, Tire Pressure menu, type of amp, and a bunch of other stuff.
By modifying this configuration, I have enabled the Tire Pressure menu on my G37!
I did this about 3 months ago to test it and see if any thing weird acts up. There hasn't been any problems and everything continues to work just like it did before.
I suppose you are wondering if anyone has tried this on a 370?
Well, MikeUCFL did yesterday, and it worked without any issues:
DIY: Enable the Tire Pressure Menu
https://youtu.be/hVikE-EOncg?si=uTqm3MMGp_xOWzx2