Tapas are not a traditional thing in Gran Canaria. You don't get the free tapa with every beer that is so common in Mainland Spain, except on Tapas nights.
That said, there are places that offer something similar to the tapas experience in the capital Las Palmas.
Toma Pan y Moja, on ther beachfront at the southern tip of Playa Chica, is one of the best.
It has sunset views, outdoor tables (the ones furthest from the door get less breeze) for hot days and a cosy interior for those cooler winter evenings.
The papas con mojo with heirloom black Canary Islands potatoes are delicious (summer season only). The cold tomato soup (salmorejo) is very tasty, the croquetas excellent and the ham is decent quality. Try the tortilla española with avocado if you dare!
With friendly service, generous portions and fair prices, Toma Pan y Moja is always a good bet for a snack on the Las Canteras beachfront.