GAG (Gestor de Arranque Gráfico, English: "Graphical Boot Manager") is a GNU GPL boot loader for x86 computers. It doesn't need its own partition - it installs directly to a boot sector of Hard disk or floppy disk - which allows it to survive to repartitioning or formatting. It is distributed as a bootable disk image, which makes it fully operating system-independent. It can be installed from a CD-ROM too, or from a linux terminal (this last method allows to install it in an USB pendrive).

GAG works on x86 processor with standard VGA graphic adapter or compatible (it can't be properly run under Hercules, CGA or EGA).

GAG aims to be an easy-to-use boot manager, but allows certain advanced features. It has a classic 3D-looking GUI driven by a keyboard. It allows to have up to 9 OSes installed. Every OS (boot partition) has an icon, label and, if needed, password protection. Configuration is menu-driven, and can be protected with its own password too.

It allows to hide primary partitions (to avoid OS collisions between C:/D: primary partitions) and auto-choose using timer.

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