Congratulations to the EU for recognising the British people's right to self determination. If Scotland, Northern Ireland (yeah ... that's complicated) or Gibraltar wish to have a referendum on self determination, we will support them. If they wish to leave then we will help them all that we can, or if they wish to remain as part of the Union, we will respect that too.
Unlike the undemocratic EU we respect the right to self-determination. And even if Gibraltar votes to go it alone, we will respect that right, and as an ally for over three hundered years, at her request we will protect her from any enemies and any invaders.
Personally, I'm sorry for Gibraltar, I realise that this will cause serious issues for you, but realise, whatever you choose, we will respect that choice, and defend you as we would our own.