Sorry, without a picture of the holster and gun on somebody’s waist its hard to say for sure. I don’t have any personal experience with the G-code nor do I recall ever seeing anybody at a match using one.
For Production division, the measurement is 2 1/8” (or the width of an overlay) from the inside of the inner belt. You also have to make sure the heel of the gun is not lower than the top of the belt.
I use a BOSS hanger. FWIW, it only takes a few minutes (5 screws total) to change it from one holster to another.
For 3-gun I went to the QLS Safariland system, more for the ease of being able to unclip the holster for stages I don’t need a pistol. But I put a QLS clip on a second holster in case I wanted to shoot my P10C instead of 2011. I’d have to measure the offset distance, but remember thinking at the time it’d be fine for Limited Division (3 3/8”). I didn’t measure it with Prod in mind.
