knockoutJS subscribe observable - woocommerce

Question

I am new to KnockoutJS and on a steep learning curve at the moment. I am using Gravity Forms and the Nested Forms Addon from Gravity Wiz. I have linked the Nested Form to products setup using WooCommerce.
Some of my products are Bundled products so when I select these items in my Nested Form I am trying to add the bundled products linked products to my Parent Form and not the bundled product itself. This is where Knockout JS comes in. I have subscribed to the ViewModel so I can see if entries are added/edited/deleted.
I can see my bundled product in the entries as shown in the code below, before this point I am doing an Ajax call to the server and I have got the list of linked products but I don't know how to append/bind them to my viewModel? Any help appreciated.
self.init = function() {
//alert("Its a bundled item");
get the content of the Nest Form Modal
var gpnf = window.GPNestedForms_2_1;
//subscribe to the ViewModel
gpnf.viewModel.entries.subscribe( function( entries ) {
// I can see my bundled product here
console.log( entries );
self.AppendBundledItem(entries, BundleProdArray);
} );
}
self.AppendBundledItem = function( entries, bp ) {
//loop through bp and append to entries then return to ViewModel
}
self.init();