Narrative:

During a flight on giv; I was the non-flying pilot during the runway xx instrument approach. I called for missed approach when runway was not seen and a missed approach was executed. Terrain warning system call came when the flying pilot didn't execute the missed approach procedure properly; followed by a warning call from the tower. We diverted and landed at ZZZ1. My recommendation is for the flying pilot to receive proper training.

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Original NASA ASRS Text

Title: Gulfstream IV pilot reported receiving a GPWS warning and a warning from Tower during a missed approach.

Narrative: During a flight on GIV; I was the non-flying pilot during the Runway XX instrument approach. I called for missed approach when runway was not seen and a missed approach was executed. Terrain warning system call came when the flying pilot didn't execute the missed approach procedure properly; followed by a warning call from the Tower. We diverted and landed at ZZZ1. My recommendation is for the flying pilot to receive proper training.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.