Has anyone read Queen's Heir by John Boyle?
It is billed as 'A fantasy set amongst the Hittites at the end of the Bronze Age', but it's essentially a novel set in Glorantha, with Hittites for Sartarites, Tarhunt for Orlanth, Warrunk for Humakt etc.
Everything mirrors Glorantha, whether it be the landscape (e.g. they travel through a wasteland which includes facsimiles of Pavis, the Block, the Dead Place etc), the people (Darklings are Uz, Lupaku are Telmori, Silmurth seems to be a young Argrath), the magic (spell matrices, Wardings, Power, divine magic, spirits and healing spells all work in a Gloranthan manner), the cities (Nochet is Byzantium with matrilineal royal succession), the temples (Earth temples are partially built underground and protected by giant snake-beings) and even the mythological history (beginning of time, the 'Draconic Empire' instead of the EWF).
It reads a lot like someone's RuneQuest campaign (plenty of side quests off the main storyline), and spends a bit of time fleshing out Humakti Warrunki training, examinations and temple politics. Worth a read - don't be put off by the lack of proofreading in the first couple of chapters (typos, missing words) as it gets better.
The main character, Joren, is a something of a Mary Sue, but it's quite good fun figuring out where you are in Glorantha at any particular moment in the text... It's part of a series called the Children of Khetar, and I'm reading the second volume at the moment, which is unfortunately much less Gloranthan and less engaging for it.