I'm not approaching the question with bias, because it makes no difference to me whether Nigerians or anyone else is searching for gay porn online or not. You, on the other hand, are emotional and desperate to prove that it's one way to satisfy your own emotional needs, regardless of how it actually is.
If you filter for the "man fukking man" searches using the link from the Guardian article I posted, as you said, the results come out clear:
Or do it by the "gay sex pics" search:
And when you do it by "shemale sex":