HOW TO FIND YOUR SUFFIX LETTER ON GS NUMBER

Eg. 176577-H
Multiple the GS number by 765432 from left side then add the total and divided by 11.
you will get some balances. If the balance is
0 = A                                                                                              176577 *
1 = F                                                                                               765432
2 = H                                                                                              7 *2 =         14
3 = K                                                                                              7 *3=         21
4 = L                                                                                               5 *4=         20
5 = M                                                                                              6 *5=        30
6 = N                                                                                              7 *6=        42
7 = P                                                                                               1 *7=          7
8 = W                                                              Total                                       134
9 = X
10 = Y                                                              134 /11 = 12 and balance 2