These comics don't all describe themselves as GL strictly speaking, but they have women in romantic relationships with one another as a central component of the story, so I imagine they might be up your alley?
It's not mentioned in the description, but a significant portion of this comic is centred around a lesbian couple:
These ones aren't on Tapas, but I highly reccomend checking them out:
http://www.obeliskcomic.com (the author's description: In 1908 NYC, Evelyn Reuter has just taken over her late father’s business, and quickly discovers that his secrets go far deeper than she’d known. Following what little trail her father left behind, Eve comes face to face with the underbelly of New York – and with Margot, a mysterious shopkeeper who may not be entirely human.)
http://thedivideandi.com (the author's description: The Divide & I is about a shepherd girl named Charlotte, and the creature in the woods that has been devouring her family's sheep.)