Where can I buy GTC Gitcoin?

Excuse me, I'm interested in purchasing GTC Gitcoin, but I'm unsure of where to find it. Could you please guide me on the best platforms or exchanges where I can securely buy GTC Gitcoin? Are there any specific requirements or steps I should follow to ensure a smooth transaction? Additionally, are there any fees associated with purchasing GTC Gitcoin, and if so, how do they compare to other similar cryptocurrencies? Thank you for your assistance.