[@rush99999]

Well the Goliath with 20 Str should be able to do a quick STR check vs Gate... or Wall.

Then again since there is no guards at the gate, anyone happen to have a 21 foot long ladder?
Alternatively, we can check have the goliath uproot a 21 foot tall tee for such use.
Or if anyone knows the spell fly or has wings...
Or tie a piece of rope long enough to an arrow, then around the gate if it one with slots and not a solid gate, have the archer do a trick with a bow arching the arrow-rope towards our end, so it loops over the height of the gate and we can climb that...
Or then again we can almost negate the -2 penalty if someone is willing to Climb the wall, then proceed to unlock the gate...

DIVINE GUIDANCE!