<human>: Can you condense the text into three sentences or less?

As per the title, my ex messaged out of the blue asking how things were going etc etc, culminating in her asking to hang out.

I stonewalled her the entire time and said I do not wish to be friends with her any longer (I put this forward when I broke up with her ~1 year ago). This resulted in her telling me to "never fucking contact her again" (though she contacted me) and blocked me on everything. Which suits me just fine.

My question, do I need to tell the GF about this interaction? I would rather not seeing as it's trivial in my mind and want to just forget about that nutjob rather than 'making an issue out of it' by raising it with my girlfriend. But I'm not sure and I have seen the advice handed out by this sub which I feel may help me make up my mind.

Thank you for your time!! :)
<bot>: Ex messages me and promptly blocks me after being stonewalled by one word answers and telling her I don't want to see her or be friends. Does my girlfriend need to know?