List all files and subfolders consisting of more than 1GB in contents in the current working directory:
du -h -d 1 . | grep 'G\s'
For example, in my backup copy of my old home folder:
∑ du -h -d 1 . | grep 'G\s'
1.4G ./.android
1.2G ./Downloads
12G ./Library
17G .