I have seen many statements in the talmud such as 'Rav Gidel said that Rav said...". I would like to know where I can find some biographical details of the life of Rav Gidel. Are there published works or online resources which have a biography of Rav Gidel?
An interesting book about biographical details of the sages of Talmud is Who's Who in the Talmud by Shulamis Frieman in which covers every personality if mentioned in the Talmud, it presents information like the place/time of birth or the place/time where that sage was born, teacher, disciple, colleagues, family, job, teachings and the source where he is mentioned.
From this Google Books search you can see a few references for what you are looking for.