Have a look at the 698th page in this pdf. The description is previous to the diagram. GPL Programmer's Manual
It's an on delay and the CMD is for start, but you'll know how to flip the logic to fit your need.
GPL does not have a OFF DELAY block, however the off delay can very easily be accomplished with some GPL logic.
I emailed you the GPL for an off delay. Create a compound from this process, save to disk and you can use it anytime you need it by simply inserting this compound in your GPL program and connecting the input and output.