Any money in your possession can be used to pay child support. If what you are asking is can it be used to determne child support that is a different and more state dependent quesiton.
This not legal advice which can only be given after a full disclosure and discussion regarding your particular situation. Any answer or comment by the attorney des not create an attorney client relationship and is not protected by privelege.
Yes, under CA Family Code 4058, all income from any source can be considered "income available for support." However, that is one number in many required input numbers for the calculation of child support, which include actual income, health insurance, child sharing percentage, etc., which must be entered for you and the other parent, so the amount may not greatly impact the award of child support.