

You should look up the definition of “gentrification.” There are a ton of options that don’t suggest that the homeless people in the forest are being forced out and replaced with wealthier homeless people.
Maybe “commercialized” would be a better word choice? Alternatively, “developed” or “sanitized?”
Generally, usage of the term “gentrification” refers to the improvement of neighborhoods - or other places where people live, like apartment complexes - and, due to increased cost of living, the displacement of the people who used to live there. Displacement of less wealthy current residents when gentrification occurs is so common that it’s implied. If it weren’t, people wouldn’t have such low opinions of gentrification.
If a forest has been gentrified, therefore, then - if you interpret “gentrified” in the same way - it follows that people who have been living there have been displaced. And since those people were living in a forest - not in a cabin in a forest - they’re necessarily homeless. Since OP didn’t say that they were building houses or apartments in the forest, that would mean that the wealthier people who displaced them were also homeless.
Since the context was another commenter calling “gentrified forest” a cursed phrase, I don’t think I’m alone in thinking that.