I’d expect you could point it at a gateway bridge running on your server fairly easily.
As for running the gateway bridge on the gateway, it has an RK3188 tablet processor (seemingly with 1 gig or ram and an 8g mtd device that is probably NAND) apparently running Ubuntu. I don’t know if the pi executable would work (Although still an ARM it’s likely a slightly distinct binary and library situation at OS level) I suspect not, but it does work on some armbian platforms. I’ve switched to a custom solution for that role and so never pursued trying to build the gateway bridge from source but I suspect you should be able to do so on the TTOG if you study the process used to build it on or for other gateways. Perhaps someone else has already done it. (To be clear, while it runs Ubuntu you can’t use a binary .deb intended for a PC running Ubuntu, a pre-built would have to be built for its particular ARM variant of ubuntu or debian)
Looks like these aren’t fully on the market yet but may have to consider evaluating one vs. custom assemblies when they become so.