There are probably about the same amount or perhaps a little less than in the general population.
Zero. Being gay is not an offense in the U.S. Military.
As of 2011, gay people can freely join the US military and do not have to hide their orientation.
The military does not keep such records.
President Obama supports full equality of gay people, including military service.
They don't really affect people in the military at all. In fact, many of the people IN the military are gay. Gay relationships have no effect on anybody else, but the people they concern. Homophobes THINK that gays have a direct effect on them, but they really don't. I have a feeling that the next generation will look with embarrassment on their homophobic ancestors, just as we look with embarrassment on our racist ancestors.
You can either use "Gay Lesbian and Bisexual" or "US Military"
At one time, the catch phrase was "Don't ask, don't tell," but as of 2011, gay people are able to serve openly in the military.
They should not, and they are not.
None. As of 2011, there is no regulation that bans gay people from serving in the U.S. Military. You are probably thinking of Don't Ask Don't Tell (DADT) which was in force from 1993 to 2011.
It allowed gay people to serve in the military if they were closeted, but this is hardly an improvement.
Yes, as of 2013, they are.
There aren't many gay people. Only about 3% to 8% of the population is gay.