Are GXP, Hollowtech II, and Mega Exo b brackets for 68mm English all interchangeable?

That’s my basic question. Building a training bike. Going to use outboard bearings, 68mm English B.B. Right now I have an old Truvative Elita compact crank. Might replace it down the road, but might go with an FSA Gossamer, Shimano Tiagra, or whatever compact double is cheapest at the time. If I install a GXP bottom bracket now, am I correct that it should work fine with an FSA or Shimano two piece crank, assuming they are road cranks with 24mm spindles? Thanks!