Is it a fish to find where we are?

My ex is highly manipulative, abusive, and crazy. I’ve had suspicions of (and he’s partially admitted to) him socially stalking me previously. He’s used 3rd parties to try to get me alone. He uses our kids as pawns. He’s used his family member’s death to manipulate me into sex. He’s made threats to kill me multiple times, using the kids as pawns even for this too. He tells people he could do anything and doesn’t care because he has nothing to lose and nothing to live for. With that being said, i never told him where I was moving when I moved out about 2 weeks ago now. And I just got a protection order and I’m pretty sure my ex got served today. My ex is/was a gun carrier and LOVEDDD his gun and part of the order is that he loses the ability to purchase or carry. So that part especially has made me scared of his reaction. Well then today, his grandma, who never talks to me for anything not even the kids, and has taken part in some of the messed up shit he’s done and has also bullied me before, asked me for a good forwarding address. She asked about my parents’ and then asked for it typed out. I’m scared because 1) He JUST got done using someone to try to trap me and my kids alone. And 2) I just took a crazy person’s gun away 😭😭 My mom said she is probably fishing for where I live and said I shouldn’t tell her.