When was GTC launched?

Could you please provide some context on the cryptocurrency or financial product known as GTC? As it's not a widely recognized acronym in the cryptocurrency or finance industry, it's difficult to give a precise answer to the question, "When was GTC launched?" However, if GTC refers to a specific token, exchange, or platform, it would be helpful to know which one you're referring to. In general, the launch date of any cryptocurrency or financial product is a significant event that is typically well-documented and publicized. If you can provide more information, I can help you find the specific launch date of GTC.