When did Coinbase rename GDAX?

Could you please elaborate on the timeline surrounding the renaming of GDAX to Coinbase Pro? I'm curious to know precisely when this decision was made and implemented. Did the renaming occur as a result of a major company rebranding? Or was it a strategic move to better align the trading platform with the Coinbase brand? Understanding the background and motivation behind this change could provide valuable insights into the evolution of Coinbase and its subsidiaries.