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  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  2  X  X  X  X  X  X  X  X  X  X  X
 0 2X  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X 2X  0  0  0  0  0  0  0 2X 2X 2X 2X 2X 2X  0 2X  0 2X  0  0  0  0  0 2X 2X 2X 2X  0
 0  0 2X  0  0  0  0  0  0  0 2X 2X 2X 2X 2X 2X 2X 2X 2X  0 2X 2X  0  0 2X 2X 2X 2X  0  0  0  0  0  0  0  0 2X 2X 2X 2X  0 2X  0 2X  0  0 2X 2X  0  0  0 2X 2X 2X 2X 2X 2X 2X 2X
 0  0  0 2X  0  0  0 2X 2X 2X 2X 2X  0 2X 2X  0  0  0  0  0  0  0  0  0 2X 2X 2X 2X 2X 2X 2X 2X  0  0 2X 2X 2X 2X  0  0  0  0  0  0  0 2X 2X 2X 2X  0 2X  0 2X  0  0 2X 2X 2X 2X
 0  0  0  0 2X  0 2X 2X 2X  0  0  0  0 2X 2X 2X 2X  0  0  0 2X 2X 2X 2X 2X 2X  0  0  0  0 2X 2X  0 2X 2X  0  0 2X 2X  0  0  0  0 2X 2X 2X  0 2X  0 2X  0  0  0 2X 2X  0 2X 2X 2X
 0  0  0  0  0 2X 2X  0 2X 2X  0 2X 2X 2X  0  0 2X  0 2X 2X 2X  0  0 2X  0 2X 2X  0  0 2X 2X  0 2X 2X  0  0  0  0 2X  0 2X 2X  0 2X  0 2X 2X  0  0  0 2X 2X 2X  0  0  0  0 2X  0

generates a code of length 59 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+50x^56+64x^58+256x^59+118x^60+21x^64+2x^84

The gray image is a code over GF(2) with n=472, k=9 and d=224.
This code was found by Heurico 1.16 in 0.11 seconds.