Most of these gy521 I've ever used have 2k2 pullups already on the board.
(two surface mount 222 resistors adjacent to SCL)
I did notice this in your first post ........ But when I measured resistance between SCL and SDA (A4 and A5 on arduino board
You do know SDA is A4 and SCL is A5...??? your quote says back to front.
Wiring diagram too small and blurry to make out any detail.
