What could be making a grinding noise when i give it gas from a dead stop at a light

Hello, sounds like it could be a catalytic converter or exhaust system heat shield that has a loose weld and is buzzing. See a local shop near you to have this looked at; one way or the other it needs to be assessed hands on because the noise will need to be heard and then a determination made. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops