A Queensland Police Service spokesman said police had cautioned a 61 year-old man in regards to the incident.
"It is believed the man has accidentally discharged a firearm, resulting in a gunshot hitting the garage door of his neighbour, across the road," the spokesman said.
"Nobody sustained any injuries from incident."
Police officers are searching a quiet street in West Mackay and detectives are speaking to residents, after reports of a 'loud noise, that sounded like a gunshot' this afternoon.
A scenes of crime officer was also photographing and examining the area on George Milton St.
A resident, who did not wish to be named, said she had heard a loud bang at around 2.30pm.
"It did sound like a gun shot. I came outside and had a look from my verandah but I couldn't see anything. I went out for a while and when I got in the kids said ' Mum there are cops everywhere outside'. I didn't believe them because we live in a very quiet street," she said.
Another resident said 'It made me jump. It definitely sounded like a gunshot".
Police are currently on the scene.
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