"footsies" at the end are only a part of the spacing game on GG, of course they arent done or work in the same way on GG than sf, mostly because the diferent options that you have with the chars in both offense and defense, and movement, i agree with what Hellmonkey said, yet i kinda feel that we cant deny that there is importance on a good spacing game, specially for the bad matchups for certain characters like jhonny vs zappa, or chipp vs eddie, dunno you but i always felt that footsies or in this case spacing is combination of space control game, poking and zoning, and depending from the game this change, specially on GG where you need a good knowledge of the matchups, and im talking about experience against many players because of the liberty on gamestyles of the chars
http://www.nicozon.net/player.html?video_id=sm8470740
http://www.youtube.com/watch?v=NGsbB0R6Dlg
just throwing this on the disscusion