No, it is not popular. 2.g3 is already only the tenth-most common move. It is apparently technically called the Steinitz Variation in ECO though it's not common enough for that to be a well-known name. It seems to often transpose to the Closed Sicilian, which starts with 2.Nc3 and usually results in White also fianchettoing (putting on g2) his light-squared bishop, though the knight usually ends up on e2, not f3.
In any case, ...b6 as a response is not seen at all in my database. ...b6 is not very common in Sicilians since Black usually tries to get in the more ambitious ...a6 and ...b5.