As of now, GNT is not on Coinbase. This is because Coinbase only allows for four coins to be traded on their platform- Bitcoin, Ethereum, Bitcoin Cash, and Litecoin. However, this does not mean that GNT will never be on Coinbase. The addition of new coins to Coinbase is based on a variety of factors including but not limited to: trading volume, price stability, geographical restrictions, and regulatory compliance.
So far, GNT has not met all the requirements set by Coinbase but that doesn’t mean it never will. For example, as GNT’s trading volume and price stability increase, it becomes a more attractive option for Coinbase. Additionally, as more and more countries legalize cryptocurrency and create regulations around it, it becomes easier for Coinbase to add new coins like GNT that are compliant with those regulations. So while GNT is not on Coinbase right now, there’s a chance it could be added in the future.