Francesco Risso will become creative director of the label.
GU’s international expansion is focused on greater China, where it has 11 stores and it will open two more soon in Hong Kong.
Grant will launch his non-profit label Community Clothing on the marketplace.
The newly revamped London flagship will be open to the public on March 18.
Wal-Mart is suing Puerto Rico for an alleged unconstitutional tax.
The company missed Wall Street's sales estimates.