Meaning 1:
Graduate Automotive Technology Education.
Meaning 2:
This is a term that is mentioned quite often in connection with plastic molding. It refers to the orifice through which the hot, molten plastic enters the mold cavity.
Meaning 3:
The decision point; often a meeting at which a management decision is made to allow the product development project to proceed to the next stage, or to recycle back into the current stage to better complete some of the tasks, or to terminate. The number of gates varies by company.