the gta kit plugs into the back of the stock head unit so you can play ipods and aux cords through the stock system...

Anyway, removing the head unit i took off the panel where your knees go if your in the drivers seat and then the metal cross member. Then you can get to the bolt more center console-ish that holds in the head unit. well helping my gf install this gta kit, i told her the instructions say DONT DROP THE BOLT. what she do? she dropped the bolt. no idea how to retrieve.... should i just buy a new oem one and install it?

heres the install video..
@ 4:32 he mentions and shows the bolt you should not drop.

any idea how one would retrieve?

 

There are long magnets with flexible extensions, that might work. Auto parts stores & Sears carry them.

 

Happend to me, got a new bolt

 

Or leave it out

Mine has been like that for about 8 years and hasn't been a problem

 

^That's what I did. I dropped it, and it wasn't worth the hassle to retrieve it.
Besides, I take out/install my head unit so often that it's one less (annoying) step I need to do