Both Team 1 and Team 2 have 1 girl and 2 boys each. So among A, C, E, B, D and F there are 2 girls and 4 boys. So the remaining person i.e. G must be a girl. Similarly, from Team 3 and Team 4 we can find out that C must be a girl. Also, A must be a boy as he is there with C in Team 1.