What is the best temperature and method to cook bacon in a grill pan?
I use two methods for bacon, depending on how much I am trying to make: 


For small batches, I use a cast iron pan. I place the bacon on the pan cold, and cook over medium heat, turning and swapping strips around as necessary to cook evenly. I find it easier to control sticking with the cold pan over a preheated one. I do not add oil because there is so much fat in the bacon already. 
For large batches, I prefer the oven where you can cook more at once. I place the bacon in a single layer on a large pan(s), and cook at 300F for approximately 30 minutes. 


I find people can be very particular in their bacon preferences for fatty, crispy, and degrees in between. This may change your cooking time substantially.