Modified the guis.yml file to add gmaster as specified on the repository README.
Modified the guis.yml file to add gmaster as specified on the repository README.

jasonlong/git-scm.com,Mokolea/git-scm.com,jasonlong/git-scm.com,Mokolea/git-scm.com,Mokolea/git-scm.com,mosoft521/gitscm-next,mosoft521/gitscm-next,git/git-scm.com,git/git-scm.com,mosoft521/gitscm-next,git/git-scm.com,jasonlong/git-scm.com,Mokolea/git-scm.com,jasonlong/git-scm.com,git/git-scm.com,mosoft521/gitscm-next