With ServiceM8's Calendar Import Add-on allows you to import staff member available/busy time from an external calendar and show it on the dispatch board.
Go to Settings and click ServiceM8 Add-ons
Open your Google Calendar from computer
1.Tick to select a calendar you want to share and click Option
2. Then click Settings and sharing
Now go back to ServiceM8 and go to Settings > Staff
Click Options and paste the "iCal" link into Import Free/Busy Time from Calendar URL field, then click Save Changes.
Staff member's external calendar will show in the dispatch board
Times blocked out in a staff member’s external calendar will mark the staff member as “Busy” at that time in the dispatch board, and be taken into account by the new Booking Suggestions feature.
Note: Calendar and Staff Schedules update every 15 minutes after the import. Calendar syncs are 90 days forward, 30 days back.