That's not a stupid question, and I'm glad you asked! 😄 Yes, .gbc is a Game Boy Color compatible file. You can play TaiFab on a real Game Boy Color (if you have the right set-up) or on a GBC emulator. I personally use Bizhawk (https://tasvideos.org/BizHawk/ReleaseHistory) to play GBC games on my computer, but there are many emulators available. 🙂
Please let me know if you have any other questions, and I hope you enjoy TaiFab! I really appreciate your support!