Homosexuality remains punishable by death in country
Security agents passed activist's house during interview
Mariela Castro led march in city of Santa Clara
Nelson Gandulla said authorities summoned him for 'interrogation'
Cuban resolve helped roll out the red carpet (for a price)
Threats forced Karla Avelar to leave her home
Cuban president's daughter, organization mark IDAHOT this month
Trinidad parking lot attendant applauded Mariela Castro
City-sponsored event to take place on June 9
Santiago is more than 500 miles from Havana
