Hi, there is the possibility of extruding the orange surface following the shape of the gray object, that is, following the blue guide lines
Hello- in this case a Loft from one of the orange edges to the corresponding edge across the gap would get you a new surface that fills that gap- is that what you need?
-Pascal
Hello- no - that is not possible as an extrusion option though in this case ExtrudeSrfTapered would get you the results you are after, I think.
-Pascal