If you are further interested in pursuing this issue, I would suggest starting with the GEDCOM article in Wikipedia and doing a general search in Google on "GEDCOM 6.0 xml."
However, as the article states:
On January 23, 2002 a beta version of GEDCOM 6.0 was released for developers to study and begin to implement in their software. GEDCOM 6.0 was to be the first version to store data in XML format, and was to change the preferred character set from ANSEL to Unicode. (Uniform use of Unicode would allow for the usage of international character sets. An example is the storage of East Asian names in their original CJK characters, without which they could be ambiguous and of little use for genealogical or historical research.)
Today, lineage-linked GEDCOM is still the de facto common denominator. Since the 2002 publication of the beta version of GEDCOM 6.0, no genealogical software supplier has yet supported it, despite the inherent advantages of an extensible and portable language like XML and its multi-lingual Unicode support.
Corrections, additions and comments are always welcome.