What Wino said...The MilPro and Mil G2 use the same magazine andl both accept the PT24/7 mags, but not the G2 PT24/7 mags. I use the 10 & 15 rd (.40) and 17 rd. (9mm) from my PT24/7's in the PT140 and PT111 MilPro's frequently at the range. No feed issues at all. You should be good to go.
The Millennium Pro & the Millennium G2 use the same mags, the Millennium Pro can use the 24/7 Pro mags => The Millennium G2 can use the 24/7 Pro mags.
Welcome from Texas!