Gradle Findbugs: This gradle script will disable findbugs until "findbugs" task is in the task graph. This allows to skip the findbugs verification for cases it is not needed.

disable-findbugs.gradle

allprojects {
    // Marker Task to enable findbugs.
    task findbugs(
        group: "Verification", 
        description: """Marker task to enabled findbugs. Findbugs is by default
                        disabled. E.g. ( ./gradlew findbugs build )"""
    )
}

subprojects {
    apply plugin: 'findbugs'
    
    findbugs { 
        // your findbugs configuration.
        ignoreFailures = true 
        
    }
    gradle.taskGraph.whenReady { taskGraph ->
        tasks.findbugsMain.onlyIf { taskGraph.hasTask((tasks.findbugs)) }
        tasks.findbugsTest.onlyIf { taskGraph.hasTask((tasks.findbugs)) }
    }
}

Working perfectly thank you!