If you want to include a Google Map in your page - trust me you do - then follow these steps:

Go to Google.co.uk  and create an account (link on top left hand of page) 

Click the maps link on the left and then My Maps

Under My Maps click "create new map"

Make your map and click link to this page. Then copy the contents of the Paste HTML to embed in website box

Go to your wiki page. In the editing bar choose source, then paste in the code from My Maps. Click 'save' and your map should be there in your web page.