I find myself referring to the wiki on a somewhat regular, as-needed basis, and most of the time I can find what I need to know.
But, as everyone knows, there are some general examples, but while almost every command is listed, the context for the variables is not always explained as clearly as it should be.
For example, on the page
http://wiki.graal.us/Script_Functions:_Client
under the GuiDrawingPanel, there is a command:
drawimagestretched(int, int, int, int, str, int, int, int, int)
with no explination of what those integers should be, or what the string referrs to. Which ints are for the x, y, and z of this stretched image? You can't tell, there is not enough information.
I did a search on drawimagestretched on the wiki search tool and the page I referred to above is all that the wiki has to offer on that command.
This is just one case of such vague descriptions have led to my using of gs1 in combination with gs2 to get by ... not with gui, of course, but in other cases, especially with strings values and string modification and accessing commands that just plain do not work in gs2, but the gs1 version still works.
I would rather use gs2 only ... but I have already requested a propper gs2 tutorial so many times here that I will not do so again here. At least here you now know of one example where the wiki has information, but the command is not explained enough to be useful. There are more cases but I do not have the time to list them presently.