Gleno is in the Ermera region.
Gleno is the capital of the Ermera district, located in a wide valley.
Gleno makes a good day trip from Dili, especially if you want to see some mountains while staying on decent roads. Head west from Dili and go straight at the Tibar T-junction. The road passes through pretty valleys, then winds over heavily-forested mountains before reaching the wide valley of Gleno after about 2 hours. There are some shops and restaurants there. Beyond Gleno, the road gets much worse (but also very scenic) as it heads to Ermera and, eventually, Maliana.
There is a warung in the market ($2). The market will also have fruit, nuts and snacks.