Is it possible to add a place card on Google maps like in this example: http://www.haydensinrye.co.uk/Haydens/Find_Us.html?
I couldn't find a reference to this in the Google Maps API documentationn.
I'm using this method to embed my map (under "Code Examples").
The site you linked to uses Google Maps Embed. There is no way to get the same in the Google Maps API JS v3 automatically
For embed, an example on how to use it is:
<iframe
width="600"
height="450"
frameborder="0" style="border:0"
src="https://www.google.com/maps/embed/v1/place?key=YOUR_API_KEY
&q=Space+Needle,Seattle+WA" allowfullscreen>
</iframe>