Maybe your question is already answered in the FAQ…?
Email is by far easiest way to get in touch, just write us at firstname.lastname@example.org
Subscribe to the mailinglist for alerts of new releases, videos and tours. Low traffic, a few emails pr year.
Official social networks
Personal website and social media
For non-Ugress projects there is the gmm.io artist and composer website and you can also follow my personal Twitter @supergmm, Instagram @gimame and Vimeo @gmm accounts with slightly different content from the official ones.