Modified to follow symbolic links.

gvm.plugin.zsh

__gvm_switch() {
    if [ -s "application.properties" ]; then
        local arr candidate candidate_home current target
        arr=($(cat application.properties | grep --color=never 'app.\(grails\|griffon\).version' | sed "s_app.\(.*\).version=\(.*\)_\1 \2_g"))
        candidate=${arr[1]}
        target=${arr[2]}
        candidate_home=$(eval echo '$'$(echo $candidate | tr '[:lower:]' '[:upper:]')_HOME)
        if [ ! -z "$(readlink $candidate_home)" ]; then
            candidate_home=$(readlink $candidate_home)
        fi
        current=$(echo $candidate_home | sed -e "s_$GVM_DIR/$candidate/__g")
        if [[ $current != $target ]]; then
            echo "Switching to $candidate $target ..."
            gvm use $candidate $target
        fi
    fi
}

chpwd() {
    __gvm_switch
}