GG means that both teams score (like 1-1, 2-1. 2-2, etc. etc.); NG when only one of the two teams scores (for example 1-0, 2-0. 3-0, etc. etc.). The handicap is the exact result: you bet that a game ends 3-1 or 3-2 etc etc. and so it must end! All or gg predictions, btts predictions and both to score predictions are found above and for FREE.