This is for GTA Online. Buy an Apartment with Garage, or an Apartment with separate garage, then get a vehicle, drive it to Los Santos Customs. Put a Tracker and Insurance on it, the achievement will unlock.
NOTE: Your Online character needs to be lvl 5 to buy a house. Thanks to SuperSnack for correcting me, it's been a year since I started on the 360. If you import an existing 360 character that's higher than level 5 like I did to the Xbox One version this will pop automatically.