Sorry to say, it will do nothing at all for you in a server setup. You could run any game server without a graphics card at all and it would make no difference. Game servers would be better served by a good processor and lots of RAM.
The only thing a graphics card could do for you in a server is if you host a media library (e.g. Plex or Jellyfin) and then need to transcode video for a device that can’t natively play it (e.g. TV can’t natively overlay subtitles, so the server has to burn them into the video that streams to the TV). Another instance could be running image processing on a security camera feed for example.
Work in finance, but I have a degree in computer science! Been a hobbyist since my early teens running game servers and the like for my friends. Never persued tech professionally but it’s definitely helped a few times in my career. Just helped our web dev guy a week or so ago on getting our office’s public IP so he could block it from showing up in his analytics. For now I’m content running my home lab :)