I'm using Wasatch for my Mutoh 1624 (4C) (which is almost like the GS) and HP Z6100 (8C) and Caldera for Latex26500 (6C)
I made some custom profiles for the Z to use only 4 colors instead of 8, that is very easy on Wasatch as long as you have Xrite i1 spectrophotometer. Theoritically and RIP is capable of making you select what number of colors you want to use, also select what Black ink to use if you have 2 sets like HP Z6100.
I'm sorry I ave never seen or used Colorburst but I'm sure you will find lots of info about how to make a 4 C profile here in signs101