Child Support Calculations

In my separation agreement, we decided to recalculate child support this year when our youngest stopped going to preschool. When calculating child support, is it necessary to include gifts giving by parents (grandparents of my children)? If parents (grandparents of children) are gifting their estate using the annual gift exclusion, should these funds be included in the calculation?
Thanks in advance.

Cash gifts should be included as income in the child support calculation. How it should be included would depend on whether it was regular and recurring income, and it sounds like in your case it is so the easiest way to include it would be to add it to your monthly salary.