Gita Gangeyam, also known as Subrahmanya Ashtapadi, is a musical Kavya very similar in structure and theme, to Gita Govindam. It is part of the Guha Bhajana Sampradaya Paddhati. It is sung during Valli Kalyanam events, in the same Ragas as Gita Govindam.
A Tamil translation of this work has been put up by me as a blog. Please see it and share with those with interest in Sanskrit literature, Bhajana Sampradaya etc. The Intro page contains links to the author's biography etc.
https://gita-gangeyam-tamil.blogspot.com/