This higher pitch is going to mean that bracing your gable roof is important.
Gable roof roof bracing.
Longitudinal bracing members should extend the full length of the roof tightly abut gable and party walls and permit diagonal bracing to pass they may be lap jointed providing the overlap is nailed to a minimum of two trussed rafters.
In the attic go to the gable end and examine the area where the triangular wall meets the rectangular wall below.
Gable end walls need to be well connected to the wall below and to the roof structure or ceiling diaphragm.
Bracing a gable roof is an important part of making sure that it is as secure and as sturdy as it possibly can be.
There are several methods for making these types of connections.