One of things I suggest trying is not only researching what food options may be available for you at your destination, but also see if you can try versions of potentially safe dishes before you go, in order to assess your tolerances. This particularly worth doing if you're on a low fodmap diet, as individual trigger foods can vary quite a bit. For instance, I have an issue with fructans due to having fructose malabsorption, so chickpea based flour is not a good option to me. This means that some of the snacks listed in the G-Adventures blog wouldn't be okay for me to have as they are still high in fructans.
I'm intending on blogging more once I've done some additional research on low fodmap foods while travelling in India, as there are still good options. I really want to visit India some time in the next few years, it looks like such an amazing country with a fascinating history and culture.
Feel free to comment or get in touch with any of your own experiences of travelling with food intolerances such as fodmap intolerances, or with coeliac disease.