SELECT rnd FROM table_13643320_2 WHERE gtp_winning_team = "#56 Blue Thunder Racing" AND gto_winning_team = "#38 Mandeville Auto Tech"
Berapa jumlah putaran di mana #56 Blue Thunder Racing menjadi tim pemenang GTP dan #38 Mandeville Auto Tech menjadi tim pemenang GTO?
CREATE TABLE table_13643320_2 (rnd VARCHAR, gtp_winning_team VARCHAR, gto_winning_team VARCHAR)