There are three variants of this item. There was the Traveller GM' Screen, the Horror GM's Screen and a general GURPS GM's screen.
This entry currently covers all of them. Of the general screen there have been four versions. The first was released in 1988. The second in the early 1990s. The third in 2000 and the fourth in 2004.
The screen contained seven pages of charts plus a sheet of Cardboard Heroes plus a copy of GURPS Lite. The Fourth edition screen also contained GURPS Update for converting characters from Third to Fourth edition.
at a future date we will split this item into four items
This appears to be at least four distinct Items, however we do not have enough information ourselves to discern which information belongs with which. Should you have one or more of these Items, please feel free to submit Corrections/additional Items with an explanation as to which you are specifically fixing.