...
From the administration bar, select Workbench, then select My Dashboard.
Navigate to the Content list panel and select the content you would like to edit.
Select the Layout tab.
Select + Add section if applicable, then select + Add block.
Under External Embeds, select Google Maps.
Enter a Title. Select whether you want it to display by checking/unchecking the Display title box. The Title will appear as a Block heading if Display title is selected.
Paste (Ctrl + V) the Google Maps/My Maps URL in the Google Maps Embedded URL field.
Enter Maps height in pixels.
Select Add block (Or Update if it’s a pre-existing Block).
Select state from the Change to: drop-down menu.
Select Save layout.