Gringas are a variety of tacos which consist of a flour tortilla filled with cheese, al pastor (Marinated Pork), and pineapple.

Every Mexican taco lover knows what is a Gringa it should be a must try on your taco list. 
The Street taco legend says the name came from a couple of girls who used to ask for the famous pastor taco with cheese and flour tortilla and other customers begin asking for the same taco as the gringa, so the owner decide to name the taco gringa.