Global Action Networks (GANs) are emerging as innovative multi-stakeholder networks that address global issues across sectors. GAN-Net aims to support the growth and effectiveness of GANs through capacity building, convening communities of practice among GANs, and increasing collaboration, legitimacy and support for GANs. GAN-Net's goals are to accelerate the scope and presence of GANs worldwide, increase GAN capacities, and build GAN legitimacy through collective identity.