Per WSM, 6.2 GPM @3200 RPM...
The total GPM for the BX24 / 50 series is 6.3 GPM (I'm looking at a brochure), but approx 2.6 is dedicated to power steering, so the available GPM to the FEL, 3PH or remotes would be only 3.7. Can't find the exact GPM for power steering, but those numbers should be very close. (The power steering GPM is not broken out in the brochure or owner's manual, but I've seen it somewhere.)