an MOT or goods vehicle testing (GVT) certificate (if you need one) - it must be valid when the new tax starts. Ghanshyam Jethwa, Executive Director, at g. GVT may refer to: Gauge vector–tensor gravity in astrophysics; German volume training, a form of weight training; Global Village Telecom, a Brazilian. an original MoT or GVT certificate (if your vehicle needs one). The MOT test result and certificate are available as soon as you've finished recording the result in the MOT testing service. the road, even if it has a current MoT or Goods Vehicle Test (GVT) certificate.