Can you buy GRT on Coinbase?

Could you please clarify for me, is it possible to purchase GRT tokens directly on the Coinbase platform? I've been hearing a lot about GRT recently and am interested in adding it to my crypto portfolio. However, I'm not entirely sure if Coinbase supports this specific token. Could you enlighten me on this matter? Would it be necessary for me to use another exchange or platform to acquire GRT, or does Coinbase indeed offer this service? Thank you for your assistance in this matter.