Once you've added custom Spawn tiles, you can grab the link to the custom location you've made. 

From your Space (not the Mapmaker), select Calendar in the toolbar. The Schedule (may be labeled Events) pane opens. 

To find your custom Spawn location link, from your Space, click Calendar in the Left Nav Menu. In the Events panel, click Create new event. 

Select Create new event. In the Create new calendar event modal, click the Select location drop-down. The name you entered for the Spawn Tile ID (e.g., "keynote") displays, with the room name in parentheses. 

In the Create new calendar event pop-up, select your custom Spawn location in the location drop-down. 

Click Create in Google Calendar to open your Google Calendar and add event details like date and time. The Location field for the event is populated in Google with the link for your custom Spawn location. 

When the scheduled event takes place, participants in your Space can open the calendar to see the event and easily navigate to the meeting location by selecting Locate, to follow a dynamic line to the meeting spot, or Teleport, to directly spawn in the meeting spot.  

Events in Gather that use a custom Spawn location provide options to easily visit the Custom Spawn location.