I got the same exact message from him too. However, I emailed the program director for GH and she said I was on a waitlist for scholarships/assistantships...she said this year was really competitive for both admission and funding so they won't find out for a while if they can scrape up more funding :/
I was accepted to the GW DrPH Global Health as well...didnt see any info about scholarships besides the link most people got about who to reach out to about Financial Aid. They asked me about my TAing experience during undergrad and grad school, so I assumed that may have meant I'd be considered for Teaching Assistantships but there was no word on that in the official letter.