Is there a plugin for Gradle that can be used to deploy to a remote WildFly server? I did a search and found nothing.
The WildFly team is aware of this and is working on it. I will keep you posted when the plugin is available. At the same time, you can watch the Maven plugin at:
https://docs.jboss.org/wildfly/plugins/maven/latest/
You can already use the Cargo plugin for this. It supports deployment to a remote WildFly server.
Gradle : https://github.com/nikit-cpp/wildflyDeployPlugin