Chargepoint doesnt charge Gem Car

Ive been searching forever now for anyone with a similar problem charging the Gem car at one of those “Chargepoint” public charging stations. The station I am referring to has both an outlet that looks like a gas pump and a little door to plug in your extension cord. Everytime i plug in the extension cord to the Chargepoint charging station it immediatly gives me a “Ground Fault error GFIC” . I never had an issue plugging it into a household outlet. Ive tried 3 different charging stations ALL give me the same error! Ive called the customer support # on the charging station and they are clueless and totally useless. Im just wondering if anyone has ever had an issue with the Charpoint stations and thier Gem car and if they found a solution. :confused: