22 out of 26 NATO member countries allow gays in their militaries.
GlobalFirePower.com ranks military strength. Their Top 10 are USA, China, Russia, India, UK, France, Germany, Brazil, Japan, and Turkey in that order.
USA – Don’t Ask, Don’t Tell
China – gays not allowed
Russia – gays have been able to serve openly since 2003
India – decriminalized gay sex in 2009, can’t find info about military
UK – gays have served openly since 2000, have been allowed to wear their uniforms in Gay Pride events since 2008
France – gays allowed since 2000
Germany – lifted a ban in 2000 that kept gays from becoming officers
Brazil – hard to tell
Japan – no official policy
Turkey – compulsory service for men 18-41, information was difficult to find but seems that they have policy similar to DADT