Sept 8 (Reuters) - CGI Group Inc GIBa.TO
* George D. Schindler to become president and chief executive officer on October 1
* Says Schindler will succeed Michael E. Roach
* Says Michael E. Roach will retire from company on September 30, 2016, while remaining on CGI board of directors Source text for Eikon: ID:nCNWc4tWpa Further company coverage: GIBa.TO