In a small bowl, combine the olives, olive oil, a splash of gin, and a splash of olive brine. Toss to combine and marinate until ready to serve.
In a food processor, combine the cream cheese, sour cream, blue cheese, gin, olive brine, and a pinch of salt. Blend until smooth and creamy (it’s okay if some blue cheese chunks remain).
Transfer the dip to a serving plate or shallow bowl and spread into an even layer. Top with the marinated olives and spoon over as much marinade as you like. Serve immediately.