GD& T Training In Ahmedabad We are inviting you all to attend GD& T Training on 12/13 of October. Guest Faculty - Mr. Momin ( Accurate Gauging). Venue - Acro Enterprise, Odhav, Ahmedabad, Gujarat. Geometric dimensioning and tolerancing (GD& T) is a system for defining and communicating engineering tolerances. It uses a symbolic language on engineering drawings and computer-generated three-dimensional solid models that explicitly describe nominal geometry and its allowable variation.