Prices here are illustrative. GT seat prices, data costs and setup are example figures for planning. Your quote depends on seat count, data vendors and deployment.
Market data is licensed separately. A commercial deployment uses a licensed feed (real-time or delayed), or your existing data contracts. Exchange fees for professional users apply either way, and index levels need their own index licence; without one, GT shows the tracking ETFs.
Some things stay on Bloomberg for now: execution through EMSX, live dealer quotes for corporate bonds and CDS, deep private-markets deal databases, Bloomberg News exclusives, and chat with people outside your firm. GT covers the analytics for all of these; the live quotes need licensed feeds.