Gay rights are pushed for by groups such as the human rights campaign, the national gay and lesbian task force, and the empowering spirits foundation. individuals unaffiliated with any of these groups but supports the cause, will attend rallies and parades on the issue, could be characterized as:

individuals unaffiliated with any of these groups but supports the cause, will attend rallies and parades on the issue, could be characterized as: a social movement

Social movement refers to any form of group action that taken in order to address specific social or political issues within a social group.