If the user clicked OK, you must build a list containing the values set by the user's interaction with the dialog. This list is what gp:getDialogInput will return to its calling function. If the user clicked Cancel, the function returns nil:
(if UserClick ; User clicked Ok ;; Build the resulting data (progn (setq Result (list (cons 42 tileRad) (cons 43 TileSpace) (cons 3 objectCreateMethod) (cons 4 plineStyle) ) ) ) )