Wokka,
The first three options for Labels (Text, ID, Unique ID) do not use GDL Script. They are all a single line of text, with a Leader in front of it.
This is why you cannot open the GDL Object, because they don't have any.
About the Hotlink Master ID: it can be set in the settings Dialog of the given Hotlinked Module:
Make sure "Suspend Groups" is
OFF.
Select your Hotlinked Module, right click and select
Hotlinked Module Settings from the context menu.
In the appearing Dialog you can set it in the
Master ID field.
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