Ms Gadsby posted to Facebook on Wednesday morning Tasmanian time from Florida in the United States to celebrate the 25^th anniversary of homosexuality being decriminalised, which occurred on May 1, 1997.

Originally from Smithton, Tasmania, Ms Gadsby has become an internationally celebrated comedian in recent years off the back of her shows Nanette and Douglas.

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Nanette, particularly, was about growing up gay and ashamed and being sexually assaulted.

"When I attended Smithton High way back in the day... all (positive) chat about homosexuality was banned in schools," Ms Gadsby wrote.

"Homosexuality itself was illegal in Tasmania until 1997... a couple of days ago marked the 25th anniversary of gay law reform in my home state.

"I ran away full of shame... but now, I not only feel welcome but a valued part of the fabric of the small world I grew up in."

She said she was posting from Florida as she was due to perform in the city of Fort Lauderdale, which made her feel "immense sadness" for political events in the US discriminating against the LGBTIQ+ community.

In March Florida's parliament passed a bill that prohibits discussion of sexuality and gender identity in the classroom.

Its opponents refer to it as the "Don't say gay" bill.

"Students and educators alike... are being hatefully pushed into shame closets by way of some very dodgy legal maneuvering all made cynically in the name of heartless political game play," Ms Gadsby said.

"Needless to say I'll be saying GAY a lot and saying it unapologetically.

"I am proof that the damage done can be overcome."

Ms Gadsby's comments also came as protestors gathered outside the US Supreme Court, following the leak of a draft ruling of the court to overturn Roe v Wade, the 1973 decision which legalises abortion nationally.

Legal commentators have noted that overturning that ruling could also have ramifications for the country's other civil rights including same-sex marriage.

Social commentator and author Roxane Gay wrote in the New York Times that "other hard-won rights - such as the rights to contraception and marriage equality - could be struck down too".

"That is to say, this decision is opening the door for social progress and civil rights to be systematically dismantled on the most absurd of pretexts," she said.