For monthly you can do a mixed group GA if the number of copies match number of groups tagged including GGG. For example if you GA 3 copies of a game you can make it for maximum 3 groups including GGG. if you GA 2 copies of a game you can add one more group to the mix apart from GGG. That will mean you get more chances at 5 entries and GGG gets ratio for one copy. So number of copies for a same GA should match number of groups chosen and should include GGG. So if I giveaway for example a game x 5 copies, I need choose GGG + 4 more groups. That means ratio is maintained per group.