Go \Go\, v. t.

1. To take, as a share in an enterprise; to undertake or become responsible for; to bear a part in.

They to go equal shares in the booty. --L'Estrange.

2. To bet or wager; as, I'll go you a shilling. [Colloq.]

To go halves, to share with another equally.

To go it, to behave in a wild manner; to be uproarious; to carry on; also, to proceed; to make progress. [Colloq.]

To go it alone (Card Playing), to play a hand without the assistance of one's partner.

Source: Webster's Revised Unabridged Dictionary (1913)