A guy asked me to show him pictures of where I live, I did then he asked what city is this, I didn't respond. How many red flags with his question?

2 big ones. Properly socialized individuals know those are innapropriate questions, that invade your privacy and threaten your safety.
If anyone's pumping you for the answers, they've got ill intent.

Someone here was stalked to their city limit based on an obscure photo they took, answering a random text.
He was male. It's deadly for everyone out there nowadays.

Block that person.