Which Credit Card types does MyGate by Wirecard support? Tom Woodward November 16, 2018 11:51 Updated Follow MyGate merchant's are able to process the following credit cards: Visa MasterCard Amex Diners Maestro Related articles I receive an error “merchant not participating", what does this mean? How can I contact Mygate? Which banks does MyGate integrate into? Comments 0 comments Article is closed for comments.