Bolasie has scored nine goals in 89 Premier League games.
Sunderland sign defender Papy Djilobodji from Chelsea.
Gernot Rohr previously coached Gabon, Niger and Burkina Faso.
Andre Ayew scored 12 goals in 34 games for Swansea in 2015-16.
Ogenyi Onazi joins Trabzonspor from Lazio 'to clear my head'.
Ghana midfielder Kevin-Prince Boateng joins Las Palmas.
Jorge Costa had been in charge of Gabon since 2014.
Chelsea winger Mohamed Salah signs for Roma on permanent deal.
Idrissa Gueye has won 32 caps for Senegal.
Mamelodi Sundowns reach the Champions League semi-final
Nottingham Forest FC Mustapha Carayol
Nottingham Forest have signed Middlesbrough winger Mustapha Carayol on two-year deals.
Gambia international Carayol, 27 joins the Championship side on free transfers.
England
Gambia