100% of Gibraltar's ~40k residents were fully vaccinated by May 1, but infections took off again starting around Jul 1, as in many places invaded by the India variant.
The current, larger outbreak than in July coincides almost exactly with the commencement of its booster shot program after Oct 10. Over 14k booster doses have been administered so far.
95% of Gibraltar's 98 deaths to date had occurred already by mid-March, lending support to the idea that vaccination prevents bad outcomes, if not infection and spread.
Gibraltar is using Pfizer.