Seems unlikely. I've seen teams at GDS + teams based on the GDS way of working in other UK gov departments solve some really knarly problems.
They most definitely won't spend time on military bases though, whereas Palantir devs will essentially live there.
GDS is amazing. However, unless we double/triple the GDS salary grades, it'll inevitably be hollowed out. From what I heard, that might've already happened.
Look for yourself, GDS is hiring a "Lead Technical Architect" for £67,126–£91,453 https://gds.blog.gov.uk/jobs/ . FAANG (and Palantir) pays up to triple that. How can GDS compete for talent?
Counter to that I’ve seen a £37m contract for a form on gov uk with absolutely no change in process, just going from a letter received to a online form