As part of the rebranding, directors Rob Campbell, Scott Malcolm and Waldemar Szlezak resigned from GPG.
The company, which posted a 61 per cent drop in annual profit in February, remains listed on the New Zealand and London stock exchanges.
Brierley founded the investment firm that bore his name in 1961.
It listed on the NZX in 1970 and became New Zealand's most high-profile company through the 1970s and 1980s as it carried out takeover after takeover.
At one stage one in every 20 Kiwis owned shares in Brierley Investments.
But its prominence began to wane following the 1987 sharemarket crash as the company struggled with poor investments.
Brierley took control of GPG in the early 1990s after he was dumped as BIL chairman.
GuocoLeisure, formerly Brierley Investments, de-listed from the NZX last year.