The overall percentage of gay people in the US is 3.5% of the total population. Since we add 1 person to our population every 16 minutes, the exact number would depend on the exact time you wanted to know.
There is absolutely no way to know. The only way to determine this would be by polling, and such is barely data collection, by no means reliable.
According to a 2011 Gallup poll, 45% of Americans oppose same-sex marriage.
Polls vary, but as of 2013, about 43% of the country opposes gay rights.
I think about 55% of America does.
55 percent of Tennessee residents oppose same-sex marriage as of 2015.
59% of Alabama residents oppose same-sex marriage as of 2015.
35% of Alaska residents oppose same-sex marriage as of 2015.
48% of Louisiana residents oppose same-sex marriage as of 2015.
48% of Oklahoma residents oppose same-sex marriage as of 2015.
59% of Arkansas residents oppose same-sex marriage as of 2015.
47% of Georgia (US) residents oppose same-sex marriage as of 2015.
49% of Kansas residents oppose same-sex marriage as of 2014.
41% of Idaho residents oppose same-sex marriage as of 2015.
According to a November 2006 Parametr­a poll, 61% of Mexicans oppose same-sex marriage.
52% of North Dakota residents oppose same-sex marriage as of 2014.
48% of South Dakota residents oppose same-sex marriage as of 2015.