You will need a GPS device to follow the gpx route available to download. There are a number of devices that are suitable. Many seasoned bike packers use devices such as the Garmin Etrex. This is not an endorsement of this device, it is only given as an example of the type of equipment used. Whatever you use it needs to be robust, reliable and be capable of operating for the time you are out on the trail.
As well as navigation there are also devices available for tracking rides, such as the Spot tracker. These are an excellent addition and offer another level of safety and ability to track your ride.
The Spot device, for instance, offers an SOS function as well as messaging functions to let friends and family know you are ok. This can be especially useful on longer, more remote rides.