GLaDOS GPS voice pack just wants to help you find your way. To the morgue.
An enterprising nerd by the name of Ryan VanMiddlesworth is clearly a bigger Portal fan than you, since he's cobbled together a GLaDOS-simulating voice pack for Garmin Nüvis. Just don't try to prevent "GLaGPS" from constantly trying to divert you to cake-related points of interest, else you may find yourself tossing your Garmin into an incinerator. Video after the break.