Hi flashrom community!
Long time no see. Just want to report success on probe & read of GigaDevice GD25Q40(B). The chip itself has different markings; 25Q41BT, as in https://ae01.alicdn.com/kf/HTB11jcQJVXXXXaeXVXXq6xXFXXXg/FREE-SHIPPING-SOP8-..., which points which is probably same or similar GigaDevice SPI flash (?)...
The chip is found on PowerColor RX5700 ITX graphics card, and according to the read ROM contents, reading was successful.
I do not dare to try erasing/writing, as this card is too damn expensive to risk it...
R, S