Gu is the acronym for "geographically undesirable."
Gu是geographically undesirable的缩写,意思是“地理位置不理想”。
来看个例子你就更明白了:
"Great guy and all, but totally gu -- he lives all the way in Boerum Hill!"
“他真的是个不错的男人,哪里都挺好,就是住得太远了,他居然住在波尔丘地区!”