There have been quite a number of NBA teams that had won after trailing 1-3 in playoffs. However, I don't believe there was ever one that had won after trailing 0-3, that's probably what confused the OP.
For example, the Celtics had done it twice to the same team, the 76ers, in the 1968 & 1981 playoffs (won in 7 games after trailing 3-1).
P.S. Just found that there have never been a team that had won after trailing 0-3, the following site listed teams that had forced game 6 & 7 after trailing 0-3 in playoffs:
