With so few days remaining, I probably should have figured this our weeks ago. Shame on me, etc.

I'm having 4 BMs and FI is having 7 (yes, SEVEN) GMs! So, how do all those people walk down the aisle without it being weird? I'm not sure I want to pair up two GMs with one BM, because our aisle might not be wide enough. I don't mind BMs walking alone, but then what do the GM do? Just sort of show up at the altar/arch?
Any help with this would be much appreciated. I've never been to a traditional wedding, so I haven't a clue about any of this!