I really do not know. It could be but then the server (and all costs involved) should be financed by somebody. Also i have never heard of an addon functioning that way. The closest i can recall was rather like that is Carbonite addon (if i am not wrong) which used to share that info between addon users. On the other hand mine nodes will spawn most likely in same places (which node spawns is random but not where will they spawn). That is why recording data locally approach is not a bad idea.
Not only does GatherMate already provide a default data set for you, its sharing module supports automatic sharing nodes with others in your guild with the addon. Did you do any research before posting this?