In traditional Chinese culture, each zodiac sign has its own unique symbolism and characteristics. However, when it comes to the question of "what is the zodiac sign when the gate has a green light", more background information and context may be needed to arrive at an accurate answer. Usually, the green light in the traffic light means that it is passable, and the "gate has a road" implies that the animal or person represented by a certain zodiac sign has a smooth road to pass.
As I understand it, the zodiac includes the Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Sheep, Monkey, Rooster, Dog, and Pig. Each zodiac sign has its own unique characteristics and symbolism. For example, horses often represent running and fast, while dragons represent authority and dignity.
If you want to learn more about the symbolism and characteristics of a certain zodiac sign, I recommend that you consult the relevant cultural sources or consult a professional. At the same time, you can also try to combine your own life experience and observations to better understand the topic.
Finally, if you have a deeper interest in zodiac culture, I recommend reading relevant books or participating in related cultural activities to better understand this ancient and rich cultural heritage.