It's a pointless stat though from a twitter feed with a clear agenda. When the case rate peaks at around 30, the fact that it makes it look like the highest case rate per capita in the world is misleading. You could do the same for any small town where there's been a minor flare up. The key thing in Gibraltar is that there are just 8 serious cases and 1 death and we don't even know if it's from vaccinated residents.
Edit: The death was an unvaccinated resident.
https://www.gibraltar.gov.gi/press-releases/government-confirms-death-from-covid-19-5802021-7155
Interestingly the final sentence of the press release disproves the tweet's point about everyone being vaccinated.
"I strongly urge everyone who has not been vaccinated to contact the GHA to arrange a vaccination now."