Well, there is one gear to match the electric motor to the drive but that is all.
A Tesla S high performance model can get to 200 miles per hour with that arrangement so what would a gear box do?
Gearboxes in petrol and diesel vehicles are used to match the performance of the motor to the required road speed.
Electric motors are close to ideal for traction use supplying maximum torque from zero speed to maximum.
Tale a test drive and enjoy the experience.
