Who was the GT2 Winning Team if Greg Mansell Leo Mansell was the LMP1 Winning Team?
create table table_24865763_2 (gt2_winning_team varchar, lmp1_winning_team varchar, PRIMARY KEY (gt2_winning_team))
select gt2_winning_team from table_24865763_2 where lmp1_winning_team = "greg mansell leo mansell"