Since in Chinese culture there is a lot of materials about astronomy and supernatural methods so I'm interested to know about Gematria as it exists in most languages...
If you are asking for similar Chinese Numerology, here's some useful info which describe the meaning of different numbers in Chinese culture. I would not define it as a classical Gematria system, but that's the only thing in my mind now.
Try the site: biblenumbers.atwebpages.com
Chinese gematria following a pattern similar to the Greek and Hebrew can be found at the web pages listed below.
This is based on the traditional Chinese using the Big5 character set. The first character "one" is given the number 1, and so on through all the Chinese characters. Since Big5 is set up with "gaps" between blocks of characters, the numbers jump accordingly just like the Greek and Hebrew, but not by increasing powers of ten.
You can find the explanation of the Chinese gematria system here: http://biblenumbers.atwebpages.com/data/schema.htm#chinese
A Chinese character gematria convertor is on this page: http://biblenumbers.atwebpages.com/chinese/convertor.htm
Complete gematria studies of a few Bible passages are listed below.
Revelation 21:6 & 22:13 http://biblenumbers.atwebpages.com/chinese/rev_22_13_chinese.htm
Revelation (the entire vision) http://biblenumbers.atwebpages.com/chinese/revelation_chinese.htm