Gamma 4 is Gamma's fourth and final album and was originally released on Ronnie Montrose's own label, RoMoCo, in 2000.

In 2005, it was re-released by Wounded Bird Records.

It was the last full album in Montrose's lifetime to feature contributions from him.

All credits adapted from the original release.

This 2000s hard rock album–related article is a stub.