How do i fill out a NPR allocation worksheet for louisiana if i had gambling winnings in that state but was a nonresident? its asking for the adjusted gross income.

Yes. Different states have different ways of calculating tax.

Nonresident and part-year resident taxpayers who are required to file a federal individual income tax return are required to file a Louisiana income tax return, IT-540B, reporting all income earned from Louisiana sources. The calculation for the IT-540B requires that a taxpayer report all income from all sources in order to determine a ratio of Louisiana adjusted gross income to Federal adjusted gross income. Only income earned from Louisiana sources, however, is taxed.

Please refer to this link for more information. Louisiana