mac here, centralcoaster33 has got the "quick & dirty" ,probably easiest to do undo etc. and I would do it first before getting "hot 'n heavy" in a deeper job 1) to see if that new whatever GPS IS what you want , where you want it , and if it works and something else may have to replace it & needs a slightly different install.
But on left END of dash (drvr's) that's covered when door is shut is the "inside" fuse panel where you can either get spade plug-ins(not the best thing) , or specialty fuse that gives "a hot-wire out" , or you can make one by soldering onto one of the metal recessed contacts (of two on top of fuse) with a wire - going out and through the dash ,under dash , or & up along low window ledging etc. Just make sure the "wire out " is the load side , in other words not the contact that's HOT (in this case switched) ! Glen 11/18/2017