I'm using GTL (Guide Template Language) on the body of an email where I want to show some images dynamically and works well. But, to let the email more "clean" I want to copy that GTL code on a different ContentArea and then call that content using AMPscript.
I tried with ContentAreaByName and TreatAsContent but on both cases doesn't work, nothing is displayed.
So my question is: Is possible use the GTL on a ContentArea or that code block have to be at the same place?