Yes..that is what I used to do load it.
It was sometimes questioned and it did feel a bit stressfull to go against the grain of the company fuel policy.
On a couple of occasions the GF fuel planning computer failed from a heavy actual ZFW to the aircraft basic ZFW before they fixed it to fail safe.
A NY to Bahrain Airbuss fell into the trap on a quick departue and diverted into Rome for fuel.
Showed the importance of a basic pilot gross fuel load check.
As you say the computer is not up there.