Gelien

Gelien is not a term with a widely established definition in standard reference works. To produce a concise, wiki-style article, I need clarification on which sense you want to cover. Do you intend Gelien as:

- a surname or geographic place name, with history or notable individuals;

- a fictional term or concept within a specific universe, with its usage and origins;

- an acronym or organizational name, with its purpose and history?

If you provide the intended context, I can craft a neutral, under-300-word article. Alternatively, I can construct a generic disambiguation-style stub that notes Gelien may refer to multiple topics and outlines possible categories, waiting for more detail.