G-Tool (G2L) is a web service that currently provides transliteration of single greek tokens to latin. Its aim is to make this possible in a flexible way by using choosable rulesets which implement spatial and temporal differences. It is developed by Fabian Körner (BBAW) and Gabriel Bodard (KCL) and hosted by the Berlin-Brandenburg Academy of Sciences and Humanities.
The process that it performs is a Greek to Latin historical transliteration. The service is designed to convert Greek text to, e.g., 19th century English transliteration, or modern French, or German, using the rules and conventions of those languages and periods.
Formerly known as Greek to Latin Historical Transliteration Tool, it was then migrated to the Collaborative Web Services platform (CoWS) and renamed Historical Transliteration Tool, whence the acronym CoWS:HiTT.
<result method="greekToLatin" ruleset="en19" token="Φιλόξενος">Philoxenus</result>
Fuller documentation at address above.