You may import any calendar into your G Suite Calendar, after exporting it from another application and saving it as a .csv, .vcs or .ical file.
Note: If you want all these events on an entirely new calendar, you will have to have created one separately prior to importing.
1. Open G Suite Calendar.
2. Next to Other Calendars click the drop down arrow, then Import Calendar.
3. Click Browse to choose the file you would like to import (.ical or .csv), then click Open.
4. Select the G Suite Calendar where you would like to import these events, then click Import.
Note: Recurring events may not be recognized when importing from CSV files. In this case, individual items will have to be readjusted.