Did you take a part in bounty campaign? They sent COOP tokens to bounty hunters, who has given their ETH address with GMD in their swap telegram channel. Write to Arthur Fleischer. I think he could check if you have old tokens and send you new. But you should have done this months ago.

If you got your GMD tokens in other way, then they havent been swapped yet. I think that if you send your GMD to Changelly, they will be swapped there to new token (that is how I understood their pinned ANN.pdf in telegram channel)