The generator matrix

 1  0  1  1  1 3X+2  1  1  X  1  1 X+2  1  1 2X+2  1  1  1  1 2X  1 2X  1  1
 0  1 X+1 X+2  3  1 3X+2 X+3  1  X X+1  1 2X+2 2X+1  1 2X 2X+3 X+2 2X  1 X+1  1 2X+3  2
 0  0  2  0 2X 2X+2 2X+2 2X+2  2  2 2X  0  0 2X  0  2 2X+2 2X  2  2  0  2 2X+2 2X+2
 0  0  0 2X 2X 2X  0 2X  0 2X  0 2X 2X  0 2X  0  0  0 2X  0 2X 2X 2X 2X

generates a code of length 24 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 21.

Homogenous weight enumerator: w(x)=1x^0+116x^21+215x^22+628x^23+154x^24+616x^25+195x^26+104x^27+4x^28+4x^29+5x^30+4x^31+1x^32+1x^34

The gray image is a code over GF(2) with n=192, k=11 and d=84.
This code was found by Heurico 1.16 in 0.015 seconds.