WTF is My Gear Score?

#	Class	Name	Guild	Score
1	warrior	Nefi	Wiped	13,515
2	rogue	Fridericus	Schattenspiel	13,293
3	priest	Lisann	Epics	13,193
4	paladin	Elburner		13,165
5	priest	Callyra	Bis einer heult	13,037
6	druid	Sakin	Seleção	13,016
7	shaman	Exodus	MyHomeBank	12,948
8	warrior	Salisko	Seleção	12,846
9	druid	Aogmiki	Unlêashed	12,837
10	paladin	Talvon		12,812
11	druid	Lashing		12,783
12	paladin	Baronlazar	Private	12,694
13	priest	Cailyn	Servatores Lucis	12,687
14	priest	Steelrose	Ritter der Allianz	12,675
15	paladin	Neltharia	Ars Moriendi	12,633
16	rogue	Enedrai	Circle of Rico	12,599
17	mage	Andü	Orden der Macht	12,572
18	priest	Geflato	Jagdgesellschaft	12,569
19	druid	Luinel	Erben von Azeroth	12,532
20	rogue	Franca	Trucidare	12,504
21	death knight	Vyper	from Classic to End	12,474
22	druid	Yerodin	Starlight	12,472
23	druid	Isarmar	Wiped	12,389
24	hunter	Odin	Chaostruppe	12,336
25	druid	Doromanthore	Sphinx	12,233