Hi, I think low gi/gl after low carb will be an excellent plan. Low GI/GL is also pretty low on carbs just not as harsh as an atkins style diet. Substitute quinoa,lentils and beans instead of potato/pasta/rice. Use oatcakes instead of crackers and have almost no bread. Keep portion sizes very small. Personally, I weighed food for the first couple of weeks to get an idea of the proper portion sizes.
I am following patrick Holford's GL diet and also have a Nigel Denby book too. lots of luck with it.