obviously the folk on gibralter care and would prefer to stay in the EU - so obviously that makes more sense than ancient treaties. bit like scotland really
The reality:
In Gibraltar, where the Remain vote was more than 96 per cent, the Remoaners have moved on from the referendum with scarcely a backward glance at the European Union.
Chief minister Fabian Picardo told a Commons select committee at Westminster that Gibraltar’s Remain vote had less to do with any attachment to the EU than a fear Spain would capitalise on Brexit by pursuing its ambition of reclaiming the Rock.
Since the referendum, Spain has, indeed, offered to keep Gibraltar inside the EU if it allows Madrid to share sovereignty over it with London.
In 1967 The result of the Gibraltar referendum was an overwhelming vote by its inhabitants to retain their links with Britain. Of the 12,762 Gibraltarians qualified to vote, no fewer than 12,138 voted to remain with Britain. Only 44 opted for the transfer of the Rock to Spanish sovereignty.
They voted again in 2002 when the result of another referendum with 98.48 per cent wishing to remain with Britain.
“We are not looking to remain as part of the European Union as being partly Spanish,” Picardo said. “The only way that somebody could describe that offer as generous would be to be entirely disingenuous.

“This is the generosity of the predator that thinks that its prey is finally prone and it’s going to take the price it’s been seeking to extract for the past 300 years,” he said. “Neither the people of the United Kingdom nor the people of Gibraltar are a prey that is on its knees, seeking any generous offer from the people of Spain.”

The Spanish have previous form:
During the 18th century, despite suffering three separate sieges at the hands of Spain, Gibraltar remained British.   
Blockaded by land and sea and faced with death by starvation, Gibraltar did not give in. During World War II, our entire civilian population was evacuated from Gibraltar out of fear of a Spanish-assisted German invasion. We survived. Fast-forward to September 1967.
Spain, then ruled by a fascist dictator, Gen. Francisco Franco, presented the Gibraltarians with a choice, the fundamental element of which is similar to the choice touted today: to pass under Spanish sovereignty. Knowing full well what the consequences would be, our hands did not tremble at the ballot box. Armed with a paper and a pencil, Gibraltarians voted 99.6 percent to remain British. In retaliation, Franco closed the border, families were separated, terrestrial links to Spain were torn, and labor, food, and hospital supplies had to be sourced from Morocco and elsewhere. This modern-day siege lasted more than 13 years. Spain refused a formal offer from the U.K. in 1966 to settle the question of Gibraltar’s status at the International Court of Justice. One can only infer why that was the case. Spain’s sophistic arguments over the isthmus could also have been resolved then.