The question you've asked makes use of wrong terms, if I had to be honest.
Your question is loaded under the assumption that Gujarati billionaires are colonizers - but that is not what colonialism is. Gujarat is a state, formed after the breaking down of Bombay province into multiple other states, including Maharashtra and Karnataka.
If you're talking about the hoarding of wealth, mostly by upper-caste/class Gujarati people (be it Parsi, Gujjar or Marwadi) who have formed the equivalent of chaebol, or what we call in Hindi as व्यावसायिक समूह (business groups), then it's crony capitalism, not colonial capitalism.