What's the Name of That Book??? discussion

The only other details remembered is that Tower might have been in the title and it was published roughly around 2000.

It was about a conservative religous country where a young man and his friend went to be trained as religious soldiers. The protagonist ended up as some religious knight’s squire and they were both gay.

Tower of the King's Daughter, first book of the Outremer series by Chaz Brenchley?

Wow, that’s it! Thank you so much!