At 4.16pm, the man was sat in a white Golf on Goodison Boulevard, Cantley when a dark blue Golf reportedly pulled up alongside it. One of the occupants of the blue Golf then discharged a firearm.
The man was taken to hospital where he remains in a stable condition.
Detectives are appealing for anyone who has any information about the incident to get in touch through 101. The incident number to quote is 566 of 24 December.