According to a College Factual study, GT is one of the most diverse campuses in the country. Out of 3,514 schools studied, GT was #239 in overall diversity. (including #749 in racial/ethnic diversity and #277 in geographic diversity - out of state students account for over 40% of the population and almost another 10% are from out of the country.)
Caucasian's make up just 46% of the undergraduate student body - 22.5% are Asian and 10.8% are International. About 7% each are Hispanic and Black.
Among graduate students (which is relatively unimportant from a sports standpoint as a much lower percentage of graduate students pay attention to college athletics where they attend school) - 51% of graduate students are International, 29.5% White, 9.3% Asian.
The only metric holding GT from even being ranked much higher in diversity if the big male/female split. If that was more typical of other schools GT would likely be ranked among the Top 50 or so most diverse campuses.
If you look at most of the other schools around it in the SE the larger ACC schools tend to have ethnicity splits with whites being 60-70% of the undergraduate population and 2-3% International, Asians tend to be in the 10% range. The SEC schools tend to be 70-80% white and around 1% International. The one school that looks similar to GT in its various diversity makeups (ethnic, geographic, etc) is Duke.
While this is obviously generalizing from demographic info my hypothesis would be the the high Asian and international numbers, as well as really large out of state population likely will inversely correlate to interest in the college football program.
GT's student body simply doesn't look like the student body of almost every other university it competes against based on conference and region.