How to unlock properties in gta online?

The only source supplied is a Wikipedia entry that describes Grand Theft Auto Online as an online multiplayer action‑adventure game developed by Rockstar North and published by Rockstar Games. It details the release dates, setting, and general gameplay mechanics such as exploring the open world of San Andreas and Los Santos. No mention is made of property ownership, acquisition methods, or any specific unlock criteria. Because the evidence does not cover the requested topic, I cannot provide a factual answer about property unlocking.