It is by no means clear that Gibralter is at risk, especially as Vichy France in the Axis precludes most of the conditions Franco set befor Spain would join the Axis, leaving Gibralter safely insulated from attack..
I was thinking of a possible attack from NA across the straights...this was ottomh, I'd have to dig up some maps to see if it were feasable. It would certainly be feasable to seriouslt degrade the rock as a usable base by bombing, IF Vichy France in NA had the planes (of course, planes defect even easier than a ship does...
Imagine France with a half million properly equipped men and several hundred modern aircraft in North Africa delicately urging further concessions from Hitler lest those rambunctious colonials do something drastic.
Now that would be very French!!