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

generates a code of length 56 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 52.

Homogenous weight enumerator: w(x)=1x^0+24x^52+48x^54+878x^56+48x^58+24x^60+1x^112

The gray image is a code over GF(2) with n=448, k=10 and d=208.
This code was found by Heurico 1.16 in 0.157 seconds.