The generator matrix

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

generates a code of length 60 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+276x^58+56x^60+120x^62+3x^64+52x^66+4x^72

The gray image is a code over GF(2) with n=240, k=9 and d=116.
This code was found by Heurico 1.16 in 2.5 seconds.