I believe it is, but it's been a very long time so I can't be sure. No reason not to try it. --- (^_^) <-- the Prophet Mohammad // APM is SC2's GearScore http://img.photobucket.com/albums/v39/Pirwzwhomper/C-Hheh.jpg
Also to take it to an extreme could I miss out Surge too and go back once I've got the team members I wish for? --- First there was two sets of footprints in the sand, then there was one set of footprints in the sand
Most Certainly, once you have and can use Cut and Flash, you can do the Gym Leaders in any order you wish; however to get to Blaine, you will need to beat Koga and get HM 03 Surf. You WILL need to beat Surge in order to fight Giovanni in Viridian Gym.
You can use the walk through walls glitch to get to Giovanni/Blaine/etc. early. The only requirement regarding the order you fight the Gym Leaders, at least with the glitches I know of, is that you fight Misty before Erika. --- YOU DON'T KNOW MEXICO SON THEY WILL BEAT YOU DOWN