Upgrade to 2.6 GPIO device_get_binding("GPIO_0") now returns null

[dlktdr]

Describe the bug
I have a project that's been working great on 2.5. I went and upgraded to version 2.6 to try it out. There were a few Bluetooth kconfig options that were depreciated I removed and it compiles okay. The issue I'm now seeing is that when
device_get_binding("GPIO_0"); is called on initialization it always return NULL. On the old version I get an address of 0x20000aa8 <__device_dts_ord_10> as expected.

I have used the default device tree file shipped in the arduino_nano_33_ble.dts file. I do have an dt overlay but even removed,
and default KConfig options seems to return null too.

Expected behavior
Work the same as V2.5.

I'm not sure if there was a change to how the device tree is accessed. I didn't see anything obvious in the release notes.
Thank you for any help.

Environment (please complete the following information):
PlatformIO, Windows
(platform: nordicnrf52@8.2.0; board: arduino_nano_33_ble; framework: zephyr)

Full Code Here. Main issue in io.cpp, arduino_gpio_init()
https://github.com/dlktdr/HeadTracker/tree/zephyr8.2.0/firmware/src

[gmarull]

You should probably consider using DEVICE_DT_GET(DT_NODELABEL(gpio0)) (combined with device_is_ready). I'd also suggest watching this great presentation from @mbolivar-nordic https://www.youtube.com/watch?v=sWaxQyIgEBY

[dlktdr]

Thank you that works! Also thank you for the video that was helpful.