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Gearboy vs BGB: catalog facts
Gearboy	BGB
Free Free and open source.	Free Free to download.
Windows, macOS, Linux	Windows
Built-in debugger Super Game Boy support	High emulation accuracy based on test ROM research Built-in debugger for ROM development
Limited to Game Boy family systems	Windows only, with other systems relying on Wine Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.