Yes I've tried both, when I first came to the forum I went very low-carb (60g) but then increased my carb intake to 90g and then upped it to around 120-130g.
Whilst upping my carbs I bought a couple of low-gi books, the authors were Rick Gallop & Jennie Brand Millar and I found both books to be extremely useful and enjoyed reading them, I've since upped my carbs intake to 150-180g a day and try to incorporate low/medium gi foods wherever possible
Therefore you can if you wish use both
@Moparp, keep the portions down so your meals are lowish in carbs and read about the Glycemic Index, the choice is yours but getting the bolus timing right and knowing how your body reacts to meals is the best thing you can learn in reducing and controlling postprandial spikes. Good luck.