Hi anthonyverfaillie,
Please download the SDK_2.2_MKL25Z128xxx4 and SDK_2.2_FRDM-KL26Z package refer Generating a downloadable MCUXpresso SDK v.2 package.

And then you can find the gpio input_interrupt example in it's folder. (For example: C:\SDK_2.2_FRDM-KL26Z\boards\frdmkl26z\driver_examples\gpio\input_interrupt)

Best Regards,
Robin
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