The generator matrix

 1  0  0  1  1  1  2  1  1  1  1  2  0  2  1  1  0  1  2  0  1  1  1  2  2  1  2  2  1  0
 0  1  0  0  1  3  1  2  2  1  3  1  1  2  0  2  0  3  1  1  2  0  2  1  1  0  0  1  1  1
 0  0  1  1  3  0  1  2  1  3  2  2  1  1  0  1  1  0  2  1  2  2  0  3  1  3  1  3  2  2
 0  0  0  2  2  2  0  2  0  0  0  2  2  2  2  2  2  0  0  0  0  2  2  0  2  2  2  2  2  2

generates a code of length 30 over Z4 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+70x^28+45x^32+10x^36+2x^40

The gray image is a code over GF(2) with n=60, k=7 and d=28.
This code was found by Heurico 1.16 in 0.00527 seconds.