This is an example of incorporating Geb into a Gradle build. It shows the use of Spock and JUnit 4 tests.
The build is setup to work with Firefox and Chrome. Have a look at the build.gradle and the src/test/resources/GebConfig.groovy files.
The build is using a specific version of geckodriver and chromedriver which might seem outdated but are compatible with the versions of Firefox and Chrome installed in CI environments used by this project.
Prior to running any builds you might need to update chromeDriverVersion and geckoDriverVersion extension variables in build.gradle to a more recent ones and ones which are compatible with the versions of Chrome and Firefox in your environment.
The following commands will launch the tests with the individual browsers:
./gradlew chromeTest
./gradlew firefoxTest
To run with all, you can run:
./gradlew test
Replace ./gradlew with gradlew.bat in the above examples if you're on Windows.
Please ask questions on Geb user mailing list and raise issues in Geb issue tracker.