Gradle looks for?gradle.properties?files is these places:

in project build dir (that is where your build script is)

in sub-project dir

in gradle user home (defined by the?GRADLE_USER_HOME?environment variable, which if not set defaults to?USER_HOME/.gradle)

Properties from one file will override the properties from the previous ones (so file in gradle user home has precedence over the others, and file in sub-project has precedence over the one in project root).

Reference:?https://gradle.org/docs/current/userguide/build_environment.html