You can buy or sell GUSD on the Gemini app, Gemini Basic interface, or Gemini ActiveTrader™, the same way you buy or sell any other crypto. Please note, if you are using ActiveTrader interface you must change your interface to the Gemini Basic in order to buy or sell GUSD.
Gemini dollars are created when you buy GUSD on the Gemini platform. The U.S. dollar amount of Gemini dollars is debited from your Gemini account balance at the time of purchase. Gemini dollars are redeemed when you sell GUSD on the Gemini platform, with the U.S. dollar amount of Gemini dollars credited to your Gemini account balance at the time of sale.
There are no Gemini fees associated with purchasing GUSD. The withdrawal of GUSD to a foreign exchange or wallet is complimentary.