That's going too far in the other direction. India as a subcontinent is not exactly a single cultural civilization, and modern India vs Mughal India vs Ashoka's time have some pretty significant contrasts, to say the least.
Yeah... That's separate issue

In general I strongly dislike the way India is potrayed in civ5 series, sometimes I have an impression it crosses the line between 'ignorant' and 'insulting' (civ5 india: mix of separate civilisations, elephant unit, poverty and "oriental spiritualism" in description, gandhi hippie and unique trait of
overpopulation - which sucked on top of that

)
We're in agreement wrt the Ghandi representation though, it's pretty silly especially when there are so freaking many potential rulers you could use from various eras that were *actually in charge* during effectively golden ages of a major world civilization of their time.
Oh, I forgot to mention that. Yeah that's another reason I should dislike Gandhi as a leader:
Most civ series leaders are people who
led their nations in their
greatest golden eras.
Indian leader is a guy who was
not even a leader of his nation in its
worst era, and he
failed to prevent situation from worsening 
(on top of that all, though this may be rare opinion, I think his ideas if implemented would
devastate his nation - his fanatic distrust of capitalism, urbanisation, and ideas of 'returning to simple life' - that's ideology of crazy hermit, not great ruler).
I mean, for most of history India had like 25% of world's GDP and was one of greatest centers of civilisation, in times of Gandhi it was like 3-5% of global GDP as almost the poorest pariah, and he failed to make the situation better in any way

and it got even worse in upcoming four decades in significant part because of his ideological legacy
Eh, maybe I dislike him as a ruler so much partially because of my political beliefs (I distrust any charismatic 'spiritual leaders' and radical 'soul over matter' ideologies) but anyway, there are so many cooler and greater and more appropriate Indian leaders than him...
EDIT
Oh and I forgot to add. "Gandhi was not ruler but spiritual leader", fine. The problem is, he failed even as spiritual leader

after all his preaching about religious tolerance (one of few of his traits I like), it didn't help at all and next 70 years of Indian history was constant worsening of religious intolerance and conflict in the subcontinent.
So here we go: an influential charismatic man who slightly helped India in independence (he overshadowed a lot of other people without whom independence would be impossible, and which was inevitable anyway after devastation of UK in WW2

), never ruled the country, his ideas were not implemented in practice (and if they did they could make things even worse), and his influence is limited to being 'inspirational symbol'.
It's as if Martin Luther King was leader of American civilisation in civ6, except I like and respect MLK much more and think he did much bigger difference. Anyway, human rights activists still shouldn't be rulers of civ series empires in my opinion.