Froggie maintains Minnesota, so he'd likely have a more definitive answer, but no, it doesn't appear that BUS-169 is signed there, at least in 2014-2016 (date of the Street View imagery). The MN-25 spur appears to be signed as a county highway in Street View, so it appears that there's nothing to add there either.
Generally there are much better sources (typically from the state department of transportation) than Google, who not long ago let anyone edit their maps.