This software can read the tgo format?
Please be more clear if you can.
But, I think that you mean to ask, what can be output FROM TG? Anything, TG can import,m can be output as an OBJ terrain with RTO off when rendering out an object. The obj can then be read in any other soft depending on memory limits. But MudBox *cannot* read tgo as far as I have ever heard, if that is what you were asking.