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

generates a code of length 90 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 90.

Homogenous weight enumerator: w(x)=1x^0+34x^90+4x^91+16x^92+4x^93+2x^94+1x^100+2x^102

The gray image is a code over GF(2) with n=720, k=6 and d=360.
This code was found by Heurico 1.16 in 0.625 seconds.