Yes! We have a few - the most commonly used is called National Library of Medicine (Grant proposals with PMCID/PMID) that will show the PMID and/or PMCID where available, and should conform to the other guidelines for NLM/NIH grant proposals. In both Word and Google Docs, If you open the default styles list, scroll to the bottom and select More styles, then you can just search for Grant:
You'll see a few other styles for grant proposals there too. If you can't find a style that suits please let us know and we'll see what we can do to help.