[SilentSoul]

For this after you finish your mapping project you can use the following
https://sampwiki.blast.hk/wiki/IsPlayerInRangeOfPoint - This will check if the player on the garage cords (x,y,z)
https://sampwiki.blast.hk/wiki/SetTimer - This will help you creating a timer to repair the car
https://sampwiki.blast.hk/wiki/SetVehicleHealth - This will repair your car if you are in garage
If you have the cords of the garage you can post there , i can script an example for you