Newbie worm gear question

Hi everybody!

I have a question regarding worm gears and worm wheels in Gearotic.
First of all I would like to say that I am a newbie on this forum and I am not a machinist by education (i am electrical engineer - sorry about that :-) )
so forgive me for the beginners mistakes that i am not aware off.

Anyway here's the question/problem:

I am about to buy a Chinese CNC engraver/mill. It is a fairly big machine (at least for my terms), the working table area is 600(X)x900(Y)x100(Z) mm.
Am also planning to buy a 4-th axis (a chuck with a stepper motor). The machine will have a 1.5 kW air-cooled spindle.
One of the things that I would like to create with the machine is a worm gear and a worm wheel (the gear will be made from steel, the wheel from aluminum - or at least I think so :-) ).
The gear and wheel will be for a DIY telescope mount project that I am planning to do.

Is it possible to create/model a worm gear and a worm wheel is Gearotic,and if so can Gearotic export G-Code for the CNC engraver/mill ?
Is the answer is no can anyone suggest a software (not to expensive dough :-) ) that could help me to do that?

Thanks for the help,

Jurica