GPP, a prime broking, investor services and wealth solutions firm, has hired Tiffany Roberts as Head of Compliance. : GPP, a prime broking, investor services and wealth solutions firm, has hired Tiffany Roberts as Head of Compliance. GPP, which launches ten years ago, provides prime brokerage, execution, custody and clearing services to hedge funds, wealth managers and broker-dealers. Roberts will take on the role after over three years at a hedge fund as senior compliance officer.