There are a number of organizations that support LGBTQ+ people, and several that support gifted folks. Unfortunately, resources for those who are both could not be found in one place—until now.
The links listed below are organized rather loosely by populations that may be interested/affected. I duplicate some that cover a lot of ground. I encourage you to go through as many as you have time for, because there are some valuable resources in here. I also list some books and article titles that you may want to read, if you seek a greater depth of understanding.
Click on the category that fits you to find more information: