Hey Juan,
Welcome back to the forums!
If you have Enable Google Maps checked under Events > Settings > General, your events should display Google Maps by default (see screenshot below).

If you need to get a little more fancy, you could use an SQL query to show/hide all maps as you please. The wp_postmeta field is _EventShowMap – meta_value “1” means the map will be shown and “0” means the map will be hidden.
Let me know if this helps answer your question. Have a great weekend and happy Earth Day!