De or het gildebrief?

The correct Dutch article is:

de gildebrief

How to use gildebrief

the gildebriefde gildebrief
this gildebriefdeze gildebrief
that gildebriefdie gildebrief
our gildebriefonze gildebrief
your gildebriefjouw gildebrief
every gildebriefelke gildebrief
which gildebrief?welke gildebrief?
a big gildebrief / the big gildebriefeen grote gildebrief, de grote gildebrief