What round was the gto winning team #48 greenwood racing?
CREATE TABLE "table1_13657883_2" (
  "rnd" real,
  "circuit" text,
  "gto_winning_team" text,
  "gtu_winning_team" text,
  "to_winning_team" text,
  "tu_winning_team" text,
  "results" text
);
SELECT "rnd" FROM "table1_13657883_2" WHERE "gto_winning_team"='#48 Greenwood Racing';