Yes, the device has the lane assistant included. As Brimstone says, with GPS.

I believe a distinction should be made between "lane assist" (=tells you which lane to drive in to be in the right lane when turning off) and "lane keep assist" (=tells you when to move left or right into the other lane"). These are two different things and the GO 5200 has the former, the latter is often offered for an extra charge on newer cars.

Virtuell via GPS.