Add GST (South Georgia and the South Sandwich Islands Time) to your list and use my-locations table to visually convert it's time to another timezone or city time.
Mouse over the colored hour-tiles and glance at the hours selected by the column.

Current time zone for GST (South Georgia and the South Sandwich Islands Time) is GST, whose offset is GMT+10 from Greenwich Mean Time (GMT).

The IANA timezone identifier for GST, South Georgia and the South Sandwich Islands Time is "GST"

It currently does not observe Daylight Savings Time.