How do you add the google app launcher (waffle menu) to a Google Site?

Question

We are creating an intranet style site via Google Sites & would like to include the standard Google app launcher menu (waffle) at the top so users can easily get into email etc from the intranet. Any idea where I can find code to embed this?

I've added links in the menu for now but would be keen to keep the usual google menu format users are already familiar with.