What is tacos goku?

As an AI language model, I do not have access to information on any specific "Tacos Goku" brand or restaurant. However, it's possible that "Tacos Goku" refers to a popular street food taco vendor in Mexico or Latin American regions. Alternatively, "Goku" might refer to the Japanese anime character from the "Dragon Ball" series, which has achieved widespread popularity outside of Asia. Without more context, it's difficult to determine what specifically "Tacos Goku" refers to or to provide further information.