Which navigational command does the image represent? no gires a la derecha. no gires a la izquierda. no gires derecho. no gires recto.

This a prohibition sign that indicates it is forbidden to turn to the right, which in spanish is Prohibido girar a la derecha or No gires a la derecha.

The other options are incorrect because are not according to the image or the sign:

No gires a la izquierda means Do not turn to the left (It is forbidden to turn to the left)

No gires derecho and No gires recto are illogic in spanish, because the words girar (to turn) and recto/derecho(straight) do not match each other with the context.