How to add sliding gate at the police garage road side in qbcore fivem?

Hi I’m new in this sector. I want to add a gate at the road side of the police garage, so can I add it. Is there any free script or should I use custom code?

Use codewalker and either create a new ymap and add the gate or edit the current ymap and add the gate. No scripting required

Thank you so much.