Each column has to be read in the correct sequence. The 1st column on your data identifies whether this information return is Corrected. The 2nd column has a value for 'Payer Name' and so forth following in the order below for the W-2G:

Corrected
Payer Name
Payer Address
Payer City
Payer State
Payer Zip
Payer Phone
Payer Federal Identification Number
Winner Name
Winner Address
Winner City
Winner State
Winner Zip
w2g_1 // gross winnings
w2g_2 // federal income tax withheld
w2g_3 // type of wager
w2g_4_month // date won
w2g_4_day // date won
w2g_4_year // date won
w2g_5 // transaction
w2g_6 // race
w2g_7 // winnings from identical wagers
w2g_8 // cashier
w2g_9 // winner's taxpayer identification number
w2g_10 // window
w2g_11 // first id
w2g_12 // second id
w2g_13 // state/payer's state identification no.
w2g_14 // state income tax withheld