I gave this a try but found no benefit, at least noticeable, for my GERD. If you use the leaf I read that is it advisable to soak pieces overnight to remove the aloin. As per Wikipedia:
Aloe vera is non-toxic, with no known side effects, provided the aloin has been removed by processing.
Like I said I have read that soaking it overnight (the water becomes red), removes the aloin. No idea if it is true. I'd cut it into pieces, soak them, and then cut out the gel and put it into a milkshake in the morning. I have never heard of anyone using the actual leaf. Its generally a debate of buying a processed product or using the gel direct from the leaf.
Hope that helps.