Wow, microdmitry... this is a simple-seeming question, but it seems harder to answer when I think about it...
I've been using chorus for years, rather intuitively. As opposed to delay, or reverb, where I calculate delay times in regards to beats, pong, stereo, mono, analog, digital delays, reverb room size, etc. Chorus, just turn knobs 'till it sounds good. I just love it! For clean, distorted, whatever, but I just tend to dial in what I think sounds good. So, with that in mind, here goes.
I don't own a G-Force, but these have been some of my observations in using chorus (pertains to high-gain situations as well. I love chorus sounds with a wall of crunch. Think Zakk Wylde or Type-O Negative.) I always prefer to have a STEREO chorus sound. In fact, just a simple stereo chorus can add SO much to the spatial/audio image. Very 3-D. It's like an instant surround sound effect. I tend to keep the rate, or speed, of chorus rather slow... I guess this would translate to only a few milliseconds. Too much adds the "swirly," or crazy tremolo sound, and of course, makes everything sound out of tune (Go figure, it is out of tune!) I use a LOT of any "depth" setting on the chorus, altho less for rhythm sounds and more for lead, to really bring out the richness of the chorused sound. Less depth usually makes for more of an up-front, mono, punchy sound, whereas more chorus depth makes for a bigger, fuller sound.
These rules usually apply for using mono chorus as well, altho I tend to use less chorus in that setting, as it sounds more like a detuning effect, which is a whole new realm to discuss (detuning mixed with stereo chorus for nifty EVH 5150 type sounds. Gotta love it!)
Hope this rambling helps in any small way.