In the 6th cello suite the 2/2 beat is almost unavoidable because of the chords.
All other Gavottes I can remember are also in 2/2, but it is possible to forget
and play them as 4/4, and sound like a total dork. Please don't do that to Bach.
Bach wrote a lot of 2/2, which was usually indicated as a c with a line through
it (like the American symbol for "cents"). Even publishers screw this up
sometimes and put "c" by mistake, so be safe, when in doubt tap your foot twice
per measure and see if it sounds less dorky.