"Г" sound in Russian
When does the letter "г" in Russian sound like "g" and when does it sound like "v"?
The letter Г can be pronounced as g, k, v, or kh. It is usually pronounced as [g] — however, it is pronounced as [k] before any unvoiced letter except К, where it is instead pronounced more like [kh]: лёгкий (easy) is [lyokh-ki], not [lyok-ki]. Additionally, it is pronounced like К OR Х at the end of a word, such as друг (friend) or Бог (God); most native speakers opt for the [kh] pronunciation in this situation, as far as my knowledge goes. Г is pronounced as [v] when between [ye] and [o] (его = yevo) or between [o] and [o] — it retains its original pronunciation (g) in some words, like много [mnoga] (a lot) and немного [nyemnoga] (some/a little). I hope this helped!
I've been studying Russian for 3 years now using several different sources, and this is what I've learned: the letter "Г" is indeed the letter "G", but as the very last letter of a word it makes a sound very similar to that of the letter "К". But to answer your question, anytime you ever see "-ого" or "-его" it is ALWAYS pronounced as the Russian letter "В". Even the word "его" meaning "his / him" is pronounced "yevo". The only exception is the word "много" which keeps the regular pronunciation "mnogo".