Can someone please help me identify what's is this thing? its in the living room ,near a window

I always hear a "tick" sound around the gas outlet. Is it normal?

Next to the gas outlet, theres a switch board, at first I thought its coming from the switch board but I dont think so. I still couldn't figure out where the sound coming from but I am sure its around that area.

Why is it in the living room ? Sorry, I recently purchased this house so not sure why anyone would put a gas outlet in the living room