The G2 does not fit in most Millenium holsters. It has to be a G2 designed holster or a holster for a Taurus 24/7 Pro.
Any of he Fobus RU97xx line of holsters fit the 111 G2
I will be testing other holsters to see which ones fit and I will report as I find them (both IWB and belt ).
I hope this will help.