You can export all configured owner trust through gpg --export-ownertrust
. The output is of the form
FINGERPRINT:TRUST:
For my own key (which has ultimate trust on my machine), there is following line included:
0D69E11F12BDBA077B3726AB4E1F799AA4FF2279:6:
It seems the trust level is corresponds to the number entered in the trust
edit command plus one:
1 = I don't know or won't say (export: 2) 2 = I do NOT trust (export: 3) 3 = I trust marginally (export: 4) 4 = I trust fully (export: 5) 5 = I trust ultimately (export: 6)
The output of this command can also be imported again through gpg --import-ownertrust
.