Which gta characters have appeared in other media?

The only character mentioned in the supplied source is Claude, the silent protagonist of Grand Theft Auto III. The text does not indicate that Claude, or any other GTA character, has appeared in other media such as films, television, comics, or books. Without additional evidence, we cannot affirm that any GTA character has crossed over into other entertainment platforms. Therefore, the answer is that no GTA character's off‑game appearances can be verified from the given information.