Tipping in The South Georgia and the South Sandwich Islands is probably the last thing on your list of things to worry about. In fact, if you got to the islands as a tourist you would have a story to tell! While it is possible, they are one of the most remote islands in the world. You would need to take a cruise to reach the island which would likely be in your itinerary for Antarctica!
If you do get the opportunity to go the tipping wouldn’t be a concern! Your chances of getting any services that would require a tip are slim to none! Have fun though the scenery looks amazing!