Havana gathering took place months after anti-government protests
Defendants faced up to three years in prison
Yoan de la Cruz broadcast July 11 demonstration on Facebook
Country's Senate will now consider measure
The US is among statement signatories
LGBTQ-inclusive peace agreement took effect in 2016
Advocacy group describes decision as a 'landmark judgment'
New government urged to expand LGBTQ rights
Mauricio Toro elected in 2018
Alexus D'Marco from the Bahamas took part
