I'm interested in the supposed Babylonian Temple prostitutes, but any information on the area would be interesting, as it has been disputed that it existed.
I know there are mentions of it in Gilgamesh, but is that the only source?
There are numerous references to temple prostitutes in Sumerian, Akkadian, and even Ugaritic texts. As you mentioned, a priestess/prostitute is central to the story of the taming of Enkidu in Gilgamesh, there are mentions of them in legal codes and temple documents, and I believe in hymns.
The only argument I've seen against its existence in light of the literary evidence is Budin's The Myth of Sacred Prostitution. She may have a point regarding the economic aspect of "prostitution" definitionally, but there's no doubt to be cast upon the prevalence of sacral sex as far as I can tell!
Come to think of it, I should reread Budin's argument when I get a chance. It's mainly about Greek sources and I read it before I'd ever thought about studying Assyriology.
Anyways- Yes, people of both sexes and occasionally ambiguous gender are referenced in the role of performing solicitous sexual acts by association with a temple position in texts of the Ancient Near East. The question is just whether or not one should call it prostitution, but most do.
Diankonoff discusses this issue. Essentially, he says that the priestesses (in ur, at least) involved in sexual rituals were nu-gig. Their are also essentially sacred prostitutes (kar-kid or heterae) who were prostitutes, but under the protection of ishtar and distinct from street walkers. The heterae are supposed to be the inspiration for babylonian love poetry.
Diakonoff, I. M. "Women in Old Babylonia Not under Patriarchal Authority." Journal of the Economic and Social History of the Orient 29.3 (1986), 225-238. Web.
I believe I read the article on JSTOR.