GF: the Airbus kit does not have TEMP correction feature.
The only way to do it is to manually modify the altitudes over waypoints which:
a) is rejected by the FMS as 3° profile is the basis of construction
b) is explicitly forbidden by VNAV OPS approval.
So, no (in our case). If temps are below what's charted then no (uncompensated) VNAV. Manual correction is not an approved TEMP compensation standard and would invalidate the coding.