Wind chill has no effect on non-living things. It will cause them to cool down quicker but only as low as the actual temp is.
As a mechanic I get lots of calls for "gelled" fuel. 7/10 times it is a dirty fuel filter from ordinary rust/dirt/sludge/etc clogging the filter and the cold thick diesel just won't flow thru that junk. If you pull the filter and liquid fuel comes out its not usually gelled. Gelled fuel will be the consistency of peanut butter most of the time and when the filters are pulled they will often be "glued" in place.
As for #2 gelling above 32 I've never seen or heard of that anywhere.