The GL posting process is much improved with GP 2013. You can choose what elements to post by limiting the posting based on Asset ID, Class ID, Document Type and Period. You can also drive the GL Reference and Batch ID.
Weekly Dynamic: Fixed Asset GL Posting
General Ledger & FinancialsTips & Hidden FeaturesGP 2013
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.