About thirty years ago a Delta Lockheed 1011 crashed short of the runway at DFW due to windshear.
It was recommended in the aftermath of the accident that airlines change their simulator training to include recovery from low-level windshear.
After extensive testing in the simulator, the test pilots found that the only way the Delta crew might have been able to save the aircraft would be to increase the pitch to the initiation of the shaker until a positive climb was established.
This is from memory, which is not as sharp as it was, so I might have missed something, but I don`t remember anything about G/A mode or any specific pitch angle.