Assembly is done using the provided Assembler:

public void assemble( ModuleAssembly module )
    throws AssemblyException
{
  [...snip...]

    new GeodeEntityStoreAssembler().withConfig( config, Visibility.layer ).assemble( module );
}

Here are the configuration properties for the Geode EntityStore:

public interface GeodeConfiguration
        extends ConfigurationComposite
{
    /**
     * Geode Topology.
     * Defaults to {@literal EMBEDDED}, see {@link GeodeTopology}.
     *
     * @return Geode Topology
     */
    @UseDefaults
    Property<GeodeTopology> topology();

    /**
     * Geode Cache Name.
     *
     * @return Geode Cache Name
     */
    @UseDefaults( "polygene:cache" )
    Property<String> cacheName();

    /**
     * Cache properties path, loaded from the classpath.
     *
     * @return Cache properties path
     */
    @Optional
    Property<String> cachePropertiesPath();

    /**
     * Cache Region Shortcut.
     *
     * In {@literal EMBEDDED} {@link #topology()}, defaults to  {@literal LOCAL},
     * see {@link org.apache.geode.cache.RegionShortcut}.
     *
     * In {@literal CLIENT_SERVER} {@link #topology()}, defaults to {@literal PROXY},
     * see {@link org.apache.geode.cache.client.ClientRegionShortcut}.
     *
     * @return Cache Region Shortcut
     */
    @Optional
    Property<String> regionShortcut();

    /**
     * Geode Region Name.
     *
     * Region names may only be alphanumeric and may contain hyphens or underscores.
     *
     * @return Geode Region Name
     */
    @UseDefaults( "polygene-entitystore-region" )
    Property<String> regionName();
}