Bringing GTA IV's Liberty City into V is one of the most ambitious community projects in any modding scene. We cover its history honestly.
What the project is
A re-creation of GTA IV's Liberty City, ported into the V engine. Substantially the entire IV map - streets, buildings, interior shells - made playable inside V's engine.
It is not a literal asset port. The legal and technical reasons for that are complicated. What's shipped is a parallel rebuild.
Where it sits today
Conditional. Parts of the project are usable. Parts are unfinished. Project status updates over time. The honest answer to 'can I play it' is 'depends on the build, the version, and how much friction you're willing to take'.
It exists, you can find it. It's not a polished commercial product.