Keeping in mind that I am not qualified to judge the medical efficacy of the diet-- the premise is to give your gut a chance to reboot and heal by taking away anything that is damaging, and providing nutrients to rebuild.

It starts as an elimination diet (the first few days you are only allowed bone broth, yogurt, and the juice of fermented vegetables). You'll be making all these things yourself, from organic ingredients if at all possible (is this necessary? Who knows).

There are 6 stages total, they gradually introduce more normal foods. You go from stocks, to vegertable soups, to boiled meats...

There's a general summary here: http://www.gapsdiet.com/gaps-introduction-diet.html

For me the difficulty was, going about my normnal day, and devoting several hours a day to cooking with a toddler to look after.

But I would suggest trying it if you're of a mind. I felt better almost immediately. My complexion changed, my mind changed. I felt like I was not at war with the world for the first time.

Infact, just talking about it Im considering starting it again. :)

Let me know if you have any specific questions.