I rechecked the current RP2350B part: the reported issue appears incorrect. The QFN-80 numbering wraps around the package:
- GPIO0–3 → pins 77–80
- GPIO4–7 → pins 1–4
- Pin 5 → IOVDD
- GPIO8–15 → pins 6–9 and 11–14
So the existing GPIO terminal-to-pad mapping is internally consistent; FLUX-14940 likely resulted from assuming GPIO0 starts at physical pin 1. A definitive check against the latest Raspberry Pi RP2350 datasheet—and correction of the Linear issue—requires live research in Agent mode.