You're asking about the distance between Earth and the star Gamma, but there's a problem: Gamma is not a specific star. It's a prefix used to label stars within a constellation.

For example:

* Gamma Cassiopeiae is a star in the constellation Cassiopeia.

* Gamma Centauri is a star in the constellation Centaurus.

To determine the distance to a star, you need to specify the full name of the star (e.g., Gamma Cassiopeiae).

Once you know the specific star, you can use online resources like:

* SIMBAD Astronomical Database: [https://simbad.u-strasbg.fr/simbad/](https://simbad.u-strasbg.fr/simbad/)

* The Extrasolar Planets Encyclopaedia: [https://exoplanetarchive.ipac.caltech.edu/](https://exoplanetarchive.ipac.caltech.edu/)

These databases provide information about stars, including their distances from Earth.