The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0
 0  X  0  0  0  X  X  X  0  0  0  0  X  X  X  X  0  0  0  0  X  X  X  X  0  X  0  X  2 X+2  2 X+2  2  2 X+2  2 X+2  2 X+2  2 X+2  2 X+2  2 X+2  2 X+2 X+2  X  2 X+2  2  2 X+2  0  2 X+2  0
 0  0  X  0  X  X  X  0  0  0  X  X  X  X  0  0  2  2 X+2 X+2 X+2 X+2  2  2  2 X+2  2 X+2 X+2  2 X+2  2  0 X+2  2 X+2  2  X  0  X X+2  0  X  0  0  0 X+2  0  2  2 X+2  2  X  X X+2  0 X+2  2
 0  0  0  X  X  0  X  X  2 X+2 X+2  2  2 X+2 X+2  2  2  X X+2  0  2  X X+2  0  0  0 X+2 X+2  X  X  2  2  X X+2 X+2  0  0 X+2 X+2  0  0  0  X X+2  2  2  2  X  2 X+2  X  0  2  0  X  X X+2  X

generates a code of length 58 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+162x^56+192x^58+152x^60+4x^64+1x^112

The gray image is a code over GF(2) with n=232, k=9 and d=112.
This code was found by Heurico 1.16 in 2.03 seconds.