My friend was asking where we could meet in the Castro and I had a moment of panic wondering the safe places in that neighborhood now that I have to be GF/DF (I feel like it's one of the tougher ones). After much research I came upon Tacorgasmico. I was able to order some awesome beef and pork tacos (naturally GF, with handmade corn tortillas!) and just asked them to hold the crema/cheese, which they did very easily. They also have interesting vegetarian fillings like nopales. Big thumbs up from me... I will be back!