Here is what gay seniors want to avoid but very sadly many still fall into circumstances that force them back into the closet in old age. Usually related to inevitably declining health.
Can choosing the right location for retirement help prevent that? Yes I think it can help but probably always short of any kind of foolproof guarantee.
In the US SAGE is an organization advocating for gay seniors. I think it would be a plus if moving to a US city if there is an active SAGE group. I know Tucson AZ does.
https://www.sageusa.org/news-posts/will-lgbt-retirees-end-up-back-in-the-closet/
What does your dream retirement look like? Your life experience living as part of the LGBTQ+ community will likely play a role in where you retire, how much money you have to spend in retirement, and even your healthcare needs as you age. Sadly, homophobia may put a damper on part of your gay retirement plan. It might even drive some part of the community back into the closet as we get older.